Darn the J30. I've seafoam'd everything and I still get around 275 miles a tank. Even with brand new spark plugs, fuel stabilizers and everything it still doesn't seem to improve. Most of my driving consists of highway to work and to school, witch is less than 2 miles away. I don't even use the A/C!
Best case scenario, during the summer driving mostly highway miles I can hit 400. But most of my driving is under 10 minutes per trip commuting so I get around 250 on a tank.
I can get 385, with it being this mixed weather in Ohio. Lowest tank I have ever gotten is 300, Its an 02 ex V6 sedan, thats with it being full and running it before the light comes on. I'm a chicken... but the A/C comes on occasionally sometimes too due to using defrost. I haven't seafoamed it yet, cause I think it might help me. Sometimes I'll start the car and it misses. TERRIBLY.