I don't know - I haven't put it in the gas tank.How far will one bottle take you?
Seriously though, I'm still working through my first bottle and have maybe another 2-3 cars' worth of solution left. It only requires a light mist on the finish, which you then spread around with a microfiber towel to get an even film. After that, just buff it with a 2nd, clean and dry microfiber towel to get the high luster. You can do a whole XL Denali in 10 minutes.