âšď¸ Skipped - page is already crawled
| Filter | Status | Condition | Details |
|---|---|---|---|
| HTTP status | PASS | download_http_code = 200 | HTTP 200 |
| Age cutoff | PASS | download_stamp > now() - 6 MONTH | 0.5 months ago |
| History drop | PASS | isNull(history_drop_reason) | No drop reason |
| Spam/ban | PASS | fh_dont_index != 1 AND ml_spam_score = 0 | ml_spam_score=0 |
| Canonical | PASS | meta_canonical IS NULL OR = '' OR = src_unparsed | Not set |
| Property | Value |
|---|---|
| URL | https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488 |
| Last Crawled | 2026-04-01 23:31:40 (14 days ago) |
| First Indexed | 2017-03-11 23:08:33 (9 years ago) |
| HTTP Status Code | 200 |
| Meta Title | Fuel efficiency explained | CarsGuide |
| Meta Description | Weâve all heard the term fuel-efficient bandied about and although itâs a very common term when talking about cars, what exactly does it mean? At the very basic level, fuel-efficiency refers to the distance you can travel on a amount of fuel. |
| Meta Canonical | null |
| Boilerpipe Text | Weâve all heard the term fuel-efficient bandied about and although itâs a very common term when talking about cars, what exactly does it mean?
At the very basic level,
fuel-efficiency
refers to the distance you can travel on a amount of fuel. Letâs break it down.
Â
Car A
Car B
Yearly driving average Â
14,750kmÂ
 14,750km
Fuel economyÂ
 4-litres/100kmÂ
5-litres/100km
Litres required Â
590 litresÂ
737 litres
Fuel cost for year (@ $1.25/litre)
$737.50Â
 $921.25
Even with a one-litre difference in fuel efficiency, the owner of Car B will need another 147 litres of fuel and spend an extra $183.75 than the owner of Car A. All that from an extra one-litre per 100km.
What qualifies as fuel efficient, then?
Anything that is listed as less than 6-litres/100km or more than 16.5km/1-litre is considered to be pretty good.
Fuel efficiency measurementsÂ
The first (and most common) reference is litres per 100km (litres/100km). This is how many litres of fuel the car needs in order to travel 100km. Youâll often see it referred to as âfuel economyâ. Rule of thumb on this one: the lower the number of litres stated, the better the fuel economy.
Not as frequently used in Australia, kilometres per litre (km/1-litre) is another way to look at a carâs fuel consumption. In this instance, the higher the number of kilometres travelled the more fuel-efficient.
Petrol vs diesel?
Petrol is the most widely-used fuel in Australia, however diesel is becoming more popular
. In the last 10 years, diesel sales have almost doubled and the idea that diesel is reserved for dirty, smelly trucks has long gone.
Generally speaking,
diesel engines are more fuel efficient than petrol engines
. They use compression ignition (instead of spark plugs), which results in a more efficient fuel-burn. This requires a more high-tech engine design, which is one of the reasons why diesel cars cost more than petrol.
Modern diesel engines are often
turbocharged
and have a lot of pulling power (also known as torque). It can shift through gears more quickly than a petrol engine and runs at lower revs per minute. All of this means it uses less fuel at each stage than an equivalent petrol engine would.
What's the difference between petrol and diesel?
What about LPG?
LPG presents many benefits, but strictly speaking, fuel economy is not one of them. In terms of cost, youâre getting a more economical deal with LPG but fuel consumption after an LPG conversion can increase by up to 40 per cent, so youâll be filling up more often. However, LPG can be up to 60 per cent cheaper than petrol, litre for litre. So the consumption increase is more than covered by the cost savings.
The lowdown on LPG
What kind of fuel do you use? Tell us your experience in the comments below.
Disclaimer: The pricing information shown in the editorial content (Review Prices) is to be used as
a guide only and is based on information provided to
Carsguide Autotrader Media Solutions Pty Ltd (Carsguide) both by third party sources and the car
manufacturer at the time of publication. The Review Prices were correct at the time of publication.
Carsguide does not warrant or represent that the information is accurate, reliable, complete,
current or suitable for any particular purpose. You should not use or rely upon this information
without conducting an independent assessment and valuation of the vehicle. |
| Markdown | [](https://www.carsguide.com.au/)

[Sign up \| Log in](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
[Welcome\!](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
- [My shortlist](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
- [Saved searches](https://www.carsguide.com.au/members/saved-searches/)
- [Edit profile](https://www.carsguide.com.au/members/edit-profile/)
- [Help](https://help.carsguide.com.au/)
- [Log out](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
[Sell my car](https://www.carsguide.com.au/sell-my-car)
Welcome\!
[Log in/](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488) [Sign up](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
Welcome\!
[Log out](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
- [My shortlist](https://www.carsguide.com.au/car-advice/fuel-efficiency-explained-29488)
- [Saved searches](https://www.carsguide.com.au/members/saved-searches/)
- [Edit profile](https://www.carsguide.com.au/members/edit-profile/)
- [Help](https://help.carsguide.com.au/)
[Buy & sell](https://www.carsguide.com.au/buy-a-car)
- Buy
- [Search all cars](https://www.carsguide.com.au/buy-a-car)
- [Used](https://www.carsguide.com.au/buy-a-car/used-car-search)
- [New](https://www.carsguide.com.au/buy-a-car/new-car-search)
- [Find a dealer](https://www.carsguide.com.au/car-dealers)
- [What car should I buy?](https://www.carsguide.com.au/simple-search)
- Sell
- [Sell my car](https://www.carsguide.com.au/sell-my-car)
- [Fast Car Offer](https://www.carsguide.com.au/sell-my-car/fast-car-offer?utm_source=navigation&utm_medium=website&utm_campaign=fast-car-offer)
[News](https://www.carsguide.com.au/car-news)
[Latest newsWhat's happening in the automotive world](https://www.carsguide.com.au/car-news)
[Concept carsThe most interesting hints of what's to come](https://www.carsguide.com.au/tags/concept-cars)
[PodcastWatch or listen to major developments, and get to know our experts better](https://www.carsguide.com.au/tags/podcast)
[RecallsWhat's been recalled and why. Are you affected?](https://www.carsguide.com.au/tags/recalls)
[TechnologyThe latest and future car tech from around the world](https://www.carsguide.com.au/technology)
[Reviews](https://www.carsguide.com.au/car-reviews)
[All reviewsBrowse over 12,000 car reviews](https://www.carsguide.com.au/car-reviews)
[Owner reviewsRead car reviews written by real owners â and write your own](https://www.carsguide.com.au/owner-reviews)
[Compare carsWe make it easy to compare design, practicality, value and more](https://www.carsguide.com.au/vs)
[EVElectric car reviews and advice on range, charging, costs and incentives](https://www.carsguide.com.au/ev)
[AdventureOff-road car reviews and advice, plus camper trailers, caravans and motorhomes](https://www.carsguide.com.au/adventure)
[FamilyFamily focused reviews and advice for everything family car related](https://www.carsguide.com.au/family)
[TradieUte and commercial vehicle reviews, including GVM and towing tests, plus related advice](https://www.carsguide.com.au/tradies)
[UrbanCity-friendly car reviews and advice on compact options, efficiency and parking](https://www.carsguide.com.au/urban)
[LuxuryLuxury car reviews and advice on comfort, tech, performance and ownership](https://www.carsguide.com.au/luxury)
Best cars by category
- [SUV](https://www.carsguide.com.au/suv/best)
- [Coupe](https://www.carsguide.com.au/coupe/best)
- [Ute](https://www.carsguide.com.au/ute/best)
- [People mover](https://www.carsguide.com.au/people-mover/best)
- [Hybrid](https://www.carsguide.com.au/hybrid/best)
- [Convertible](https://www.carsguide.com.au/convertible/best)
- [Hatchback](https://www.carsguide.com.au/hatchback/best)
- [Electric](https://www.carsguide.com.au/electric/best)
- [Sedan](https://www.carsguide.com.au/sedan/best)
- [Commercial](https://www.carsguide.com.au/commercial/best)
- [Wagon](https://www.carsguide.com.au/wagon/best)
[Car of the Year](https://www.carsguide.com.au/car-of-the-year/2026)
- [Car of the year Winner 2026](https://www.carsguide.com.au/car-news/2026-carsguide-car-of-the-year-overall-winner-revealed-zeekr-7x-hyundai-santa-fe-kia-ev3)
- [Best Small Car Under \$50K](https://www.carsguide.com.au/car-news/best-small-car-starting-under-50k-announced-2026-carsguide-car-of-the-year-mg-s5-ev-nissan)
- [Best Small Car Under \$80K](https://www.carsguide.com.au/car-news/best-small-car-starting-under-80k-announced-2026-carsguide-car-of-the-year-audi-q3-bmw-x1)
- [Best Medium SUV Under \$60K](https://www.carsguide.com.au/car-news/best-medium-suv-starting-under-60k-revealed-2026-carsguide-car-of-the-year-honda-zr-v)
- [Best Medium SUV Under \$130K](https://www.carsguide.com.au/car-news/best-medium-suv-starting-under-130k-announced-2026-carsguide-car-of-the-year-bmw-x3)
- [Best Large SUV Under \$100K](https://www.carsguide.com.au/car-news/best-large-suv-starting-under-100k-revealed-2026-carsguide-car-of-the-year-toyota)
- [Best Large SUV Under \$220K](https://www.carsguide.com.au/car-news/best-large-suv-starting-under-220k-unveiled-2026-carsguide-car-of-the-year-bmw-x5-porsche)
- [Best Ute Under \$85K](https://www.carsguide.com.au/car-news/best-ute-starting-under-85k-revealed-2026-carsguide-car-of-the-year-kia-tasman-ford-ranger)
[Advice](https://www.carsguide.com.au/car-advice)
[All adviceWeâre here to help you with comprehensive car advice](https://www.carsguide.com.au/car-advice)
[EVExpert advice thatâs specific to electric and hybrid cars](https://www.carsguide.com.au/ev/advice)
[FamilyExpert tips for travelling with your family](https://www.carsguide.com.au/family/advice)
[AdventureHow-tos, off-road tips and adventure travel destinations](https://www.carsguide.com.au/adventure/advice)
[Ask the guideGot a question? Our car experts are here to help](https://www.carsguide.com.au/ask-the-guide)
[UrbanTips and advice on how to make the most of city life](https://www.carsguide.com.au/urban/hacks)
[TradieAdvice on getting the most out of utes and commercial vehicles for work](https://www.carsguide.com.au/tradies/advice)
[LuxuryPractical advice for choosing, buying and owning a luxury car](https://www.carsguide.com.au/luxury/advice)
[SafetyEverything you need to know to keep you and your family as safe as possible](https://www.carsguide.com.au/tags/safety)
[Car dimensionsEverything you need to know when sizing up your new car](https://www.carsguide.com.au/car-dimensions)
[Towing capacityUnsure of your car's maximum towing capacity? We've listed all relevant models here.](https://www.carsguide.com.au/towing-capacity)
[Tyre pressureWondering how much air to put in your tyres? Our database has the answer](https://www.carsguide.com.au/tyre-pressure)
[Pricing & specs](https://www.carsguide.com.au/price)
Guides
[](https://www.carsguide.com.au/adventure)
[Reviews](https://www.carsguide.com.au/adventure)[Advice](https://www.carsguide.com.au/adventure/advice)[Camper-trailer Reviews](https://www.carsguide.com.au/adventure/camper-trailers)
[](https://www.carsguide.com.au/family)
[Reviews](https://www.carsguide.com.au/family)[Advice](https://www.carsguide.com.au/family/advice)[7 Seat SUVs](https://www.carsguide.com.au/suv/7-seat-suvs)
[](https://www.carsguide.com.au/tradies)
[Reviews](https://www.carsguide.com.au/tradies)[Advice](https://www.carsguide.com.au/tradies/advice)[Tips](https://www.carsguide.com.au/tradies/tips)
[](https://www.carsguide.com.au/urban)
[Reviews](https://www.carsguide.com.au/urban)[News](https://www.carsguide.com.au/tags/urban)[Advice](https://www.carsguide.com.au/urban/hacks)
[](https://www.carsguide.com.au/ev)
[Reviews](https://www.carsguide.com.au/ev)[News](https://www.carsguide.com.au/tags/ev)[Advice](https://www.carsguide.com.au/ev/advice)
[](https://www.carsguide.com.au/luxury)
[Reviews](https://www.carsguide.com.au/luxury)[News](https://www.carsguide.com.au/tags/luxury)[Advice](https://www.carsguide.com.au/luxury/advice)
[Spotlight](https://www.carsguide.com.au/spotlight)
[Sell my car](https://www.carsguide.com.au/sell-my-car)
1. [Home](https://www.carsguide.com.au/)
2. /
3. Fuel efficiency explained
# Fuel efficiency explained
[Petrol prices](https://www.carsguide.com.au/tags/petrol-prices) [Budget cars](https://www.carsguide.com.au/tags/budget-cars) [Buyer Guide](https://www.carsguide.com.au/tags/buyer-guide) [Green Cars](https://www.carsguide.com.au/tags/green-cars) [Car Advice](https://www.carsguide.com.au/car-advice)
...
![]()
At the very basic level, fuel-efficiency refers to the distance you can travel on a amount of fuel.
[![Photo of CarsGuide team]()](https://www.carsguide.com.au/authors/carsguide-team)
[CarsGuide team](https://www.carsguide.com.au/authors/carsguide-team)
8 Apr 2019
3 min read
[![Photo of CarsGuide team]()](https://www.carsguide.com.au/authors/carsguide-team)
[CarsGuide team](https://www.carsguide.com.au/authors/carsguide-team)
8 Apr 2019
3 min read
Weâve all heard the term fuel-efficient bandied about and although itâs a very common term when talking about cars, what exactly does it mean?
At the very basic level, [fuel-efficiency](https://www.carsguide.com.au/car-advice/fuel-efficiency-ratings-what-do-they-tell-you-31319) refers to the distance you can travel on a amount of fuel. Letâs break it down.
| | | |
|---|---|---|
| | **Car A** | **Car B** |
| Yearly driving average | 14,750km | 14,750km |
| Fuel economy | 4-litres/100km | 5-litres/100km |
| Litres required | 590 litres | 737 litres |
| Fuel cost for year (@ \$1.25/litre) | \$737.50 | \$921.25 |
Even with a one-litre difference in fuel efficiency, the owner of Car B will need another 147 litres of fuel and spend an extra \$183.75 than the owner of Car A. All that from an extra one-litre per 100km.
[ **Add CarsGuide as a preferred source in Google Search**](https://www.google.com/preferences/source?q=https%3A%2F%2Fwww.carsguide.com.au)
[ **Add CarsGuide as a preferred source in Google Search**](https://www.google.com/preferences/source?q=https%3A%2F%2Fwww.carsguide.com.au)
**What qualifies as fuel efficient, then?**
Anything that is listed as less than 6-litres/100km or more than 16.5km/1-litre is considered to be pretty good.
**Fuel efficiency measurements**
The first (and most common) reference is litres per 100km (litres/100km). This is how many litres of fuel the car needs in order to travel 100km. Youâll often see it referred to as âfuel economyâ. Rule of thumb on this one: the lower the number of litres stated, the better the fuel economy.
Not as frequently used in Australia, kilometres per litre (km/1-litre) is another way to look at a carâs fuel consumption. In this instance, the higher the number of kilometres travelled the more fuel-efficient.
**Petrol vs diesel?**
[Petrol is the most widely-used fuel in Australia, however diesel is becoming more popular](https://www.carsguide.com.au/car-advice/whats-the-difference-between-diesel-and-petrol-cars-47267). In the last 10 years, diesel sales have almost doubled and the idea that diesel is reserved for dirty, smelly trucks has long gone.
Generally speaking, [diesel engines are more fuel efficient than petrol engines](https://www.carsguide.com.au/car-advice/diesels-may-use-less-fuel-but-thats-not-what-theyre-best-at-37453). They use compression ignition (instead of spark plugs), which results in a more efficient fuel-burn. This requires a more high-tech engine design, which is one of the reasons why diesel cars cost more than petrol.
Modern diesel engines are often [turbocharged](https://www.carsguide.com.au/car-advice/what-is-a-turbocharger-36401) and have a lot of pulling power (also known as torque). It can shift through gears more quickly than a petrol engine and runs at lower revs per minute. All of this means it uses less fuel at each stage than an equivalent petrol engine would.
Read More
- [ What's the difference between petrol and diesel?](https://www.carsguide.com.au/car-advice/whats-the-difference-between-diesel-and-petrol-cars-47267)
**What about LPG?**
LPG presents many benefits, but strictly speaking, fuel economy is not one of them. In terms of cost, youâre getting a more economical deal with LPG but fuel consumption after an LPG conversion can increase by up to 40 per cent, so youâll be filling up more often. However, LPG can be up to 60 per cent cheaper than petrol, litre for litre. So the consumption increase is more than covered by the cost savings.
Read More
- [ The lowdown on LPG](https://www.carsguide.com.au/car-news/the-lowdown-on-lpg-23596)
## **What kind of fuel do you use? Tell us your experience in the comments below.**
Related cars for sale on CarsGuide
[View all related cars for sale](https://www.carsguide.com.au/buy-a-car) [View cars for sale](https://www.carsguide.com.au/buy-a-car)
[![Photo of CarsGuide team]()](https://www.carsguide.com.au/authors/carsguide-team)
[CarsGuide team](https://www.carsguide.com.au/authors/carsguide-team)
The CarsGuide team of car experts is made up of a diverse array of journalists, with combined experience that well and truly exceeds a century. We live with the cars we test, weaving them into our family lives to highlight any strenghts and weaknesses to help you make the right choice when buying a new or used car. We also specialise in adventure to help you get off the beaten track and into the great outdoors, along with utes and commercial vehicles, performance cars and motorsport to cover all ends of the automotive spectrum. Tune in for our weekly podcast to get to know the personalities behind the team, or click on a byline to learn more about any of our authors.
[About Author](https://www.carsguide.com.au/authors/carsguide-team)
CarsGuide's Latest Articles
[NEWS Strap in for CarsGuide's holiday road trip review! ![]()](https://www.carsguide.com.au/car-news/read-this-before-your-holiday-road-trip-100427)
[NEWS Episode 242 - Fordâs Ranger and Everest sales problem! ![]()](https://www.carsguide.com.au/car-news/is-ford-too-reliant-on-ranger-and-everest-for-sales-who-buys-the-escape-and-puma-carsguide)
[NEWS Episode 241 - Best hybrid SUVs! ![]()](https://www.carsguide.com.au/car-news/best-hybrid-suvs-toyota-rav4-kia-sorento-mg-hs-and-more-carsguide-podcast-241-87217)
Disclaimer: The pricing information shown in the editorial content (Review Prices) is to be used as a guide only and is based on information provided to Carsguide Autotrader Media Solutions Pty Ltd (Carsguide) both by third party sources and the car manufacturer at the time of publication. The Review Prices were correct at the time of publication. Carsguide does not warrant or represent that the information is accurate, reliable, complete, current or suitable for any particular purpose. You should not use or rely upon this information without conducting an independent assessment and valuation of the vehicle.
## Car of the Year 2026


[![]() Best Medium SUV Starting Under \$60K revealed\!](https://www.carsguide.com.au/car-news/best-medium-suv-starting-under-60k-revealed-2026-carsguide-car-of-the-year-honda-zr-v)
[![]() Best Ute Starting Under \$85K revealed\!](https://www.carsguide.com.au/car-news/best-ute-starting-under-85k-revealed-2026-carsguide-car-of-the-year-kia-tasman-ford-ranger)
[![]() Best Large SUV Starting Under \$100K unveiled\!](https://www.carsguide.com.au/car-news/best-large-suv-starting-under-100k-revealed-2026-carsguide-car-of-the-year-toyota)
[![]() Best Small Car Starting Under \$50K announced\!](https://www.carsguide.com.au/car-news/best-small-car-starting-under-50k-announced-2026-carsguide-car-of-the-year-mg-s5-ev-nissan)
[![]() Best premium medium SUV under \$130K announced](https://www.carsguide.com.au/car-news/best-medium-suv-starting-under-130k-announced-2026-carsguide-car-of-the-year-bmw-x3)
[![]() Best Large SUV Starting Under \$220K unveiled\!](https://www.carsguide.com.au/car-news/best-large-suv-starting-under-220k-unveiled-2026-carsguide-car-of-the-year-bmw-x5-porsche)
[![]() Best Small Car Starting Under \$80K announced\!](https://www.carsguide.com.au/car-news/best-small-car-starting-under-80k-announced-2026-carsguide-car-of-the-year-audi-q3-bmw-x1)
[![]() 2026 CarsGuide Car of the Year revealed\!](https://www.carsguide.com.au/car-news/2026-carsguide-car-of-the-year-overall-winner-revealed-zeekr-7x-hyundai-santa-fe-kia-ev3)
Related cars for sale on CarsGuide
[View all related cars for sale](https://www.carsguide.com.au/buy-a-car) [View cars for sale](https://www.carsguide.com.au/buy-a-car)
![CarsGuide Logo]()
## Stories and articles
[![]()  Subaru BRZ 2026 review: tS Manual 7.3/10 28 Feb 2026](https://www.carsguide.com.au/car-reviews/subaru-brz-ts-manual-100910)
[Toyota GR86 2026 review: GTS Dynamic Performance Pack 7.5/10 02 Feb 2026](https://www.carsguide.com.au/car-reviews/toyota-gr86-gts-dynamic-performance-pack-100720)
[Porsche 911 2026 review: GT3 8.0/10 15 Oct 2025](https://www.carsguide.com.au/car-reviews/porsche-911-gt3-99831)
[Nissan Ariya Evolve 2026 review: snapshot 7.6/10 16 Sep 2025](https://www.carsguide.com.au/car-reviews/nissan-ariya-evolve-99528)
[See more expert reviews ](https://www.carsguide.com.au/car-reviews)
[![]()  Ford Ranger 2026 review: Super Duty dual cab-chassis - off-road test 7.9/10 11 Mar 2026](https://www.carsguide.com.au/adventure/ford-ranger-super-duty-dual-cab-chassis-101020)
[GWM Cannon 2026 review: XSR - off-road test 7.0/10 03 Mar 2026](https://www.carsguide.com.au/adventure/gwm-cannon-xsr-100949)
[Toyota LandCruiser 70 Series 2026 review: 76 Series GXL 2.8L manual - off-road test 7.0/10 06 Feb 2026](https://www.carsguide.com.au/adventure/toyota-landcruiser-70-series-76-series-gxl-28l-manual-100761)
[Volvo EX30 2026 review: Cross Country 7.3/10 04 Feb 2026](https://www.carsguide.com.au/adventure/volvo-ex30-cross-country-100678)
[See more adventure reviews ](https://www.carsguide.com.au/adventure)
[![]()  Ford F-150 Platinum 2026 review: snapshot 7.3/10 01 Apr 2026](https://www.carsguide.com.au/tradies/ford-f-150-platinum-101200)
[Nissan Navara ST-X 2026 review: snapshot 7.8/10 31 Mar 2026](https://www.carsguide.com.au/tradies/nissan-navara-st-x-101183)
[Ford F-150 Lariat 2026 review: snapshot 7.6/10 30 Mar 2026](https://www.carsguide.com.au/tradies/ford-f-150-lariat-101178)
[Isuzu N Series 2026 review: Australian first drive 7.6/10 29 Mar 2026](https://www.carsguide.com.au/tradies/isuzu-n-series-101129)
[See more tradie reviews ](https://www.carsguide.com.au/tradie)
[![]()  Suzuki Vitara Hybrid 2026 review: Australian first drive 6.0/10 17 Mar 2026](https://www.carsguide.com.au/urban/suzuki-vitara-hybrid-101071)
[Kia Stonic 2026 review: Sport 7.3/10 14 Mar 2026](https://www.carsguide.com.au/urban/kia-stonic-sport-101034)
[Kia K4 2026 review: Sport+ Hatch 7.4/10 07 Mar 2026](https://www.carsguide.com.au/urban/kia-k4-sport-hatch-100984)
[Toyota GR Corolla 2026 review: GTS Auto 7.5/10 02 Mar 2026](https://www.carsguide.com.au/urban/toyota-gr-corolla-auto-100915)
[See more urban reviews ](https://www.carsguide.com.au/urban)
Related cars for sale on CarsGuide
[View all related cars for sale](https://www.carsguide.com.au/buy-a-car) [View cars for sale](https://www.carsguide.com.au/buy-a-car)
## Comments
[For dealers](https://www.autotradergroup.com.au/)[For advertisers](https://adspecs.carsguidemedia.com.au/)[Help desk](https://help.carsguide.com.au/)
[](https://www.facebook.com/carsguide.australia)[](http://www.youtube.com/user/CARSguideVideo)[](https://www.tiktok.com/@carsguide.com.au)[](https://www.instagram.com/carsguideaus)[](https://www.linkedin.com/company/carsguide)[](https://x.com/Carsguide)[](https://www.threads.com/@carsguideaus)
[](https://www.carsguide.com.au/)[](https://www.autotrader.com.au/)[](https://www.gumtree.com.au/)
[Terms](https://www.carsguide.com.au/conditions-of-use)[Privacy](https://www.carsguide.com.au/privacy-policy)
Š CarsGuide Autotrader Media Solutions Pty Ltd. All rights reserved.
ABN: 37 150 757 574 |
| Readable Markdown | Weâve all heard the term fuel-efficient bandied about and although itâs a very common term when talking about cars, what exactly does it mean?
At the very basic level, [fuel-efficiency](https://www.carsguide.com.au/car-advice/fuel-efficiency-ratings-what-do-they-tell-you-31319) refers to the distance you can travel on a amount of fuel. Letâs break it down.
| | | |
|---|---|---|
| | **Car A** | **Car B** |
| Yearly driving average | 14,750km | 14,750km |
| Fuel economy | 4-litres/100km | 5-litres/100km |
| Litres required | 590 litres | 737 litres |
| Fuel cost for year (@ \$1.25/litre) | \$737.50 | \$921.25 |
Even with a one-litre difference in fuel efficiency, the owner of Car B will need another 147 litres of fuel and spend an extra \$183.75 than the owner of Car A. All that from an extra one-litre per 100km.
**What qualifies as fuel efficient, then?**
Anything that is listed as less than 6-litres/100km or more than 16.5km/1-litre is considered to be pretty good.
**Fuel efficiency measurements**
The first (and most common) reference is litres per 100km (litres/100km). This is how many litres of fuel the car needs in order to travel 100km. Youâll often see it referred to as âfuel economyâ. Rule of thumb on this one: the lower the number of litres stated, the better the fuel economy.
Not as frequently used in Australia, kilometres per litre (km/1-litre) is another way to look at a carâs fuel consumption. In this instance, the higher the number of kilometres travelled the more fuel-efficient.
**Petrol vs diesel?**
[Petrol is the most widely-used fuel in Australia, however diesel is becoming more popular](https://www.carsguide.com.au/car-advice/whats-the-difference-between-diesel-and-petrol-cars-47267). In the last 10 years, diesel sales have almost doubled and the idea that diesel is reserved for dirty, smelly trucks has long gone.
Generally speaking, [diesel engines are more fuel efficient than petrol engines](https://www.carsguide.com.au/car-advice/diesels-may-use-less-fuel-but-thats-not-what-theyre-best-at-37453). They use compression ignition (instead of spark plugs), which results in a more efficient fuel-burn. This requires a more high-tech engine design, which is one of the reasons why diesel cars cost more than petrol.
Modern diesel engines are often [turbocharged](https://www.carsguide.com.au/car-advice/what-is-a-turbocharger-36401) and have a lot of pulling power (also known as torque). It can shift through gears more quickly than a petrol engine and runs at lower revs per minute. All of this means it uses less fuel at each stage than an equivalent petrol engine would.
- [ What's the difference between petrol and diesel?](https://www.carsguide.com.au/car-advice/whats-the-difference-between-diesel-and-petrol-cars-47267)
**What about LPG?**
LPG presents many benefits, but strictly speaking, fuel economy is not one of them. In terms of cost, youâre getting a more economical deal with LPG but fuel consumption after an LPG conversion can increase by up to 40 per cent, so youâll be filling up more often. However, LPG can be up to 60 per cent cheaper than petrol, litre for litre. So the consumption increase is more than covered by the cost savings.
- [ The lowdown on LPG](https://www.carsguide.com.au/car-news/the-lowdown-on-lpg-23596)
## **What kind of fuel do you use? Tell us your experience in the comments below.**
Disclaimer: The pricing information shown in the editorial content (Review Prices) is to be used as a guide only and is based on information provided to Carsguide Autotrader Media Solutions Pty Ltd (Carsguide) both by third party sources and the car manufacturer at the time of publication. The Review Prices were correct at the time of publication. Carsguide does not warrant or represent that the information is accurate, reliable, complete, current or suitable for any particular purpose. You should not use or rely upon this information without conducting an independent assessment and valuation of the vehicle. |
| Shard | 23 (laksa) |
| Root Hash | 14301022936065544023 |
| Unparsed URL | au,com,carsguide!www,/car-advice/fuel-efficiency-explained-29488 s443 |