I just got an 01 Catera about a week ago, it has around 70,000 miles on it. After I drive it for a little while, I can smell burning oil when I stop and get out. I can't find any oil leak spots on the ground though. I read somewhere, after I bought it of course, that Catera's have oil leaks at around 30,000 miles. Is this true and any suggestions.

 

Valve cover gaskets are the most common.
The rear main seal would be second.