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Wait a second..

When I bought my car (10 years ago) and read reviews, a lot of them say here's what the epa said you'd get for mileage, and heres what we actually got. There is always a difference (maybe 10%). But if it claims 30 mpg and you are getting 17 , I like to think more than few people might notice.

Part of the reason VW was accused of cheating on emissions was it helped mileage.

edit: as pointed out, its 50% more fuel... But still a noticeable difference..



50% more fuel than official results would be like claims 30 mpg and actually getting 22.5 mpg.


Consuming 50% more fuel than 30MPG is 20MPG, not 22.5MPG: 30 miles divided by 1.5 gallons equals 20 miles/gallon.


True. I was thinking 100% more would be 15 MPG so 50% more would be 22.5. Thanks for the correction.


Makes sense, I was wondering where that number came from. Of course it all goes nonlinear when you take the reciprocal.


Fair enough.. But still a significant real world difference.

EPA (USA) tests aren't really real world and they don't just drive the cars. Well they drive them on a dyno on a preset pattern (see the picture in the link).

https://www.fueleconomy.gov/feg/how_tested.shtml

they measure emissions to estimate fuel consumption.




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