gas mileage per tank help

Who revived a dead thread?

Anyways, I usually average about 264 miles a tank from full til the light comes on in my 99 Cobra vert with 3.73s. One time a couple of months ago I got 282 miles. But, I seafoamed my car a couple of weekends ago and filled up twice since then. For some reason I got 242 miles Idk why but I thought seafoam was supposed to help me get better mpg. We'll see how many miles I get the next time my fuel light comes on.

I just got back from Kentucky and decided to check my mileage.

The best was 28.8 all highway @ 70-75 mph, no tailgating, no defrost or A/C, current oil is one quart 15-40 and the rest 5-30, tires aired up up 46 psi. The car was very dirty and probably could have broken thirty with it being fully waxed.

04 GT stock with 4r75.