yeah i also get around 280-300 on 14 gallon of gas. I4 Auto 6gen and I have a lead foot. I drive 1/2 on highway 1/2 city i never exceed 3.5rpm usually on the freeway i am @ 3k rpm cruzing around 90mph only use 87 octan and change my oil every 3K plus use injector cleaner every 6k. only mod is K&N air filter.