many times i have just run the car untill it sputters and stalls at stop lights not good practice i know, but since my odo works irratically, i cant trust it either. ive found that after i run it this low, it'll hold about 28gal!!! i didnt know these cars had such big tanks. i get 600-700 miles out of an ENTIRE tank. (a rough estimate on account of the odo)