It started happening at 30,000 miles and temps below 32 degrees and a cold start only. Now it happens when the outside temps are below 60 degrees. After the engine runs for 30 minutes the smell goes away. What might be the cause? The dealer is the only person not to smell the problem.

 

Sounds to me like you have a oil leak. I would be willing to bet that the oil is leaking onto the exhaust. It smells until the oil is burnt off of the exhaust. Check for a oil leak somewhere on the engine.