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For 70-80mph running at 3250-4000rpm sounds like my car which has 4.111 final gears. Do you guys know if rpm has a big factor in gas mileage? or is it only throttle position?

my dad had a 2002 Ford Escape 4 banger DOHC 5 speed and at 75 mph at 4000 rpm he got 25 mpg if it helps any

GAS MILEAGE no comment at all !

Those of you getting less than the originally rated fuel economy, are you sure that everything is in tune and you're not lacking in maintenance. Good o2 sensor and what not?

If everything’s in good shape and you're economy hit isn't because of your right foot, do you know if the fuel you buy has ethanol in it? I'm sure you've heard on the news about the push from many Midwest states to require corn based ethanol in the mixtures of gas. If the car is built for it, this could be a good thing (though the jury is still out on the concept). Cars like ours though were not built to for this. The biggest thing is that the stoichiometric point is changed when ethanol is added to the fuel. This means that the calibration to our o2 sensors will be off as the ethanol blend burns leaner than regular gasoline. The result is the computer richening the mixture and therefore causing poor fuel economy. Recent studies suggest the hit on fuel economy could be as much as 30%.

It might be worth your interest to find local fuel that does not use ethanol or to at least find out if your fuel does. I’m working on a few solutions. Some have used xelene in their fuel to correct for the extra oxygen in the fuel. This also helps octane as well, but may be cost prohibitive. I’m testing out an o2 interpretation device with my wideband that might work. Oxygenated fuel hits the northeast about this time of year. Ethanol will be the oxygenating agent as they no longer use MTBE. I’ll let you know if/how it works. I just happen to be using my Subaru as the test rig

Currently getting about 28 - 30 mpg on my twin turbo,when driven off boost.
With both turbo's up and running that drops to 17mpg

scottzg wrote:I just did some all freeway driving, and i got 410 miles on my tank of gas. I was using 87 and averaging about 80-85 mph the whole time. That works out to about 25mpg. Is that about what everyone else is getting? I have a manual NA sedan.

Oh, and this is added, i get about 360 city, that works out to be 22.5.

how is your tank so much bigger? I get less than 300 to a tank but ~27 mpg

tzedek wrote:how is your tank so much bigger? I get less than 300 to a tank but ~27 mpg

holy quoting 2 years ago, batman!

I think i did the math in my head?

I get 25-27 mpg in mixed driving to school. Phase II EJ22E with a 5MT Love my wagon, not bad mileage either