Maybe use gallons of gas instead of liters? And also drive in miles instead of kilometers.

Pile of leaves blocking your intake filter
Banana Shoved up tailpipe
Someone pissed in your gas tank.
Wawa Iced Tea in your gas tank
Check Engine Light on but someone pulled the bulb
Dead Bodies in the trunk weighing you down
Tires deflated to 10psi
Brakes Frozen to rotor
Driving with Ebrake on because you though you could drift

Download the aCar / fuelly (depending on android or IOS) app and track your mileage there. It will give you much more accurate numbers.

I avg 11-12 liters/100km, but that's with spirited driving. Probably the worst offender I noticed was the soft 245 tires. The tires are where I saw the greatest drop, but that may be the chicken/egg conundrum (sticky tires = spirited driving).

Stickier tires drop gas mileage at least 2-3 mpg even if you drive gently. Especially from the stock tires.

I call it "aggressive defensive driving".

12 l/100km is 19.6 mi/gal (US) or 23.5 mi/gal (UK). It is a little on the high side but not excessively so. I get around 21 mi/gal driving in stop-go traffic.

Stop revving in neutral. Next caller!

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You were not around yet but there was a whole thread by a guy that drove two miles to work and then sat with his car running for 45 minutes at lunch every day. He would reset the average on the gauge every day so the bulk of the time it was pulling data was at idle. He could never quite grasp why his mileage was so horrible.

I just walked past 100 people doing exactly that in the parking lot.

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And 95 of them probably wonder why they use so much fuel!

My dad was telling me a similar story. The guy was ranting and raving how his mpg was doing so well in his V8 pickup and how it was far better than my dad's 91 Honda CRX (which was pretty zippy and could easily achieve 51mpg). The guy's claim was "I only have to fill up my truck once every two weeks," (he also was one that only lived two minutes away and idled during lunch).

Another guy claimed he was saving money at the pump by driving 40 miles round-trip to the Indian Reservation (because there's no tax on their gas).

Sometimes I wonder if these people are just kidding or being serious.

My everyday road has a part that has no traffic lights, half of it is autobahn and the other half is a highway that is even better than a autobahn. I'm so damn lucky :) Anyway I can choose the time to go work and home, so often there is at least one free lane.

I've made a measurement on a part of my way. This is the profile of that part:

https://i.imgur.com/IT2FB07.jpg

The length of the road is ~18 miles. And elevation difference is about 0.25 miles. (I'm living on the top of a mountain :D )

I've measured these with cruise control set to 82km/h (51mph)

This is home->work: (3.3 litre per 100km --> 71.3 US miles per gallon)
https://i.imgur.com/5i3yW6b.jpg


And reverse: (6.5 litre per 100km --> 36.2 US miles per gallon)
https://i.imgur.com/qppyfXN.jpg


If there is nothing wrong about my car's computer, (which I think it works alright) and I didn't make a stupid mistake (which I do occasionally) ain't these values crazy good? :)

However, I do not use the cruise control all the time, and some part of my way is in village ways, which has some good curves. My average consumption is usually around 10.5 litre per 100km --> 22.4 US miles per gallon; which I think is not bad considering the way I drive it :D

Agreehttps://babang.xyz/assets/4/o.png