My father always told me to deduct 25% from the CAFE numbers on the windshield. That has proven to be true for the last 30 years, at least in my case.

[quote=doberman]My father always told me to deduct 25% from the CAFE numbers on the windshield. That has proven to be true for the last 30 years, at least in my case.[/quote]

That's probably a good rule of thumb. Just curious that our three Hondas, two Civics and the traded Accord, either meet or exceed the number and these other cars don't. Our long gone V8 Grand Cherokee met its number. Both the motorcycles get better than expected mileage, 72mpg on the scooter and 45-52mpg for the touring bike.

New car dealers won't even look into a fuel mileage issue unless it's severe. They just blow us off. With a car that is operating 15% less effecient than advertised a little computer time to take a whack at correcting it wouldn't be a bad idea. The car is coming up on an oil change so I'll take it to the dealer and PAY them to look at it. The frustration comes from having to pay them to get their product to perform as advertised because they refuse to take responsibility. Ah, but it is the way it is.