i don't know but i'm scandelous with my gas tank, i always fill it up with 94 octane but I also run to damn near empty. had my first bout with my SVT running out of gas last friday, the car just sputtered for a few blocks and eventually cut off. thank god a few ladies gave me a ride to and from the gas station laugh . But it was a little surprising because I really only drove it about 40 or so miles once the light came on. could have sworn that I've pushed it longer than that in times past.