Shit gas mileage in general. Expect to do 17 mpg in city and 23 mpg highway in an rx-8 w/o a turbo. Burns oil by design so women that bought em b/c 'cute' did a pretty solid job of burning up motors early. (you actually are supposed to check and top off your oil every other fillup). They build up carbon and kill apex seals early if you don't know how to properly drive them (every time you take it out even for short trips give it atleast a 9k rpm redline. I'm rocking an 08 rx-8 w/ a stage 3 turbo. I generally run it around 350hp but could boost it well over 450-500 if I wanted. They're super cheap project cars b/c the market is legit flooded w/ clean bodies w/ burnt crispy engines in need of rebuilds.