Well, that would depend on how long it ran upside down.....If engine stopped when it went turtle, then it probably would be fine. Just replace all fluids and bleed the brakes. I was really surprised how easy it is for a car to go bottoms up. Saw a Honda flip at Mid-Ohio in turn 9 this year. Car slid off the road and both left side wheels hit the sand trap at the same time. Car went right over. Didn't seem to hurt anything really. As I recall, when they got it shiny side up, he started it and drove it away. Then again, if they only get $50 for it, then it hurts them again...as it should.