Lead foot costs you 1,2-5mpg
 

04/15/2010 366.9 10.107 0 Lead foot highway with a few stops, this is my try to get bad mileage tank to see how much I'm saving mostly by changing driving methods, the results are becoming clear.
36.30


04/13/2010 360.5 9.73 0 alot of idling at endless lights mostly highway 80% average highway speeds Must have seen 30+ lights on this tank and 30 miles or so not on the highway, pretty good for usual driving.. kind of cold out/45 degrees for 1/4 of the tank this same route i was getting 35.5 last year during the summer(when it was warmer/with practically no backroads or anything off the highway), obviously something I'm doing is helping. be careful not to push a car to hard with a wai on. you have less horsepower(this tank I did a bunch of errands 45 min city driving)
37.05


if I average out the city driving and idling I did I would have 38-39-40 maybe 42 mpg highway average

so I can pretty much surmise, I saw a difference in better mileage by using lower rpms, gliding
and not accelerating up hills/only downhills in that i got a bunch of city (45 minutes or more maybe) driving out of my tank and better mileage, oh yea I was also trying to draft constantly on the bottom tank..

I'd just have to get a cruise control ridden tank to prove this I suppose..

Ill be back with that next week, until then anyone want to add to this?

It has been well documented that slowing down reduces fuel consumption with a majority of drivers. That's why the national speed limit was lowered to 55 in the 70's.

Yup. That's mainly a result of aerodynamic drag, which goes up as a square of speed rather than merely proportional. As you go faster, the rate at which aerodynamic drag increases, increases.

of course, just trying to say generally if I ignore how I'm driving I get less mpg all around..

Duh, so does everyone else.

:p