This ain't asphalt, son. This is dirt.
5 seconds sound clip from the Cars movie soundboard.
You can hear this line at 00:49:17 in the Blu-ray version of the movie.
Quote context
[...]
- All he's tryin' to do is make that there turn.
- No, no, no, no! Oh, great. Perfect turns on every track I've ever raced on.
- Sheriff, why don't you go get yourself a quart of oil at Flo's. I'll keep an eye on him.
- Well, thanks, Doc. I've been feelin' a quart low.
- This ain't asphalt, son. This is dirt.
- Oh, great. What do you want? You here to gloat?
- So you're a judge, a doctor and a racing expert.
- I'll put it simple. If you're goin' hard enough left, you'll find yourself turnin' right.
- Oh... Right. That makes perfect sense. Turn right to go left! Yes! Thank you!
[...]