Gas mileage, is this normal?

[kjewer1]

I get around 18mpg at 25 psi around town. At WOT it burns 1 gallon per minute. I can still get ~27-28 mph on the highway. My average is usually 20. When the car was stock, highway was over 30, city was ~24, tank average was 26-28. In both examples there is plenty of boosting (thats what I bought the car for after all ) How is your O2 sensor doing? It can be causing excessive fuel consumption long before it tosses a code. If you dont have a logger it will be tough to diagnose though (another reason to get one!).

[GotGrip666]

what if you add octane booster i used to put that stuff in my old r32 all the time

[gsxeclipse97]

93 is the highest here and its only at exxon i thought 115 was race gas well that is what some of the tracks have i think that is what my friend put in his car but it was like 5 something a gallon.. I would like to find a place with 94-100 never seen one, where do you guy live? I've never tried to use the booster but i have thought about it seems like a good idea i guess.

[97GSTspyder]

good thing this subject was brought up....the other night when i filled my tank, last night i was below the empty line and i had only gotten 240miles since i last filled it....and during this tank of gas, i only got on it once, twice at the very most. i drove it normal...now i know i should be getting a hell of a lot more than 240miles to the tank for normal city driving....anyone know what could be wrong?