ok, the 02TL, we don't change the oil til every 7500 miles, ass opposed to 3000. Is this cuz they put synthetic oil in there, or do we just put regular oil in there?

 

All the 2nd Gen TL's are 7500 for normal driving (which is most of us) with Regular oil. The car never came with syn. Syn is something many put in because they trust it more and it is better. You can put in what ever you want.