Originally Posted by Speedy

I'll get in on this since I watch gas mileage very closely.

2002 4Runner Auto 4WD 4.10 gears P265/70/16 tires at 38psi.

Stock I got a best of 21.98 MPG averaged over the the ENTIRE tank of fuel. This means I drove 394.30 miles and filled the tank with 17.94 gallons. I don't stop the pump when it shuts off, I sip fuel into the tank until I can visually see it at the top of the filler neck. I figure this takes all variance out of the pump shut off mechanism. This was a 70/30 mix of Hwy/City driving using 87 octane fuel from Kroger (cheap stuff).

After supercharging, adding the 7th injcector, 2.2" pulley and tuning I got a best tank of 19.56 mpg (358.50 miles and 18.33 gallon fill up). I typically get an additional 2+ gallons into the tank after the pump does the auto shut off thing. This was with normal driving, so even adding the SC didn't make much difference for me, but I've got a great tune. I pretty much use Shell fuel exclusively since putting the SC on.

I've also tracked the mileage from most of my tanks of gas in an Excel spreadsheet and have a lifetime average of 19.95 mpg in this 4Runner.

With lots of WOT playing around driving I get 17-18 mpg which I don't think is bad at all for a 300 HP SUV.