Engine compatibility years

Most of the better parts stores will usually have them on the shelf. Just be sure it's one for fuel and not AC or tires.

I would contact the company that you got it from first, doing anything else could void any warranty on it. It might just need to be run hard a bit to get the rings to seal but they should be able to advise you. Then do what they say first. If that doesn't work tell them and return here.