Which is better 3k mile oil or 15k oil?

[JeepKj03]

Oil starts turning brown/black and breaking down when you start the engine after the oil change. I'll just stick with the UOA. We do it at work for our small fleet of trucks. It will tell you anything you really want to know about whats going on inside your engine with out tearing it apart.

 

[HoosierJeeper]

Autozone has oil specials also. They tell me they make no profit on oil,just saying.

But if they don't have an ad I don't check them outk,.....\\\\


(Pep boys usuallt has an ad)