Just switched to Royal Purple (5w20) at the 70K oil change. I have a 2004 manual.

After the change, I have picking up some unusual odors from the car. Some smell like burnt rubber. Car is driving fine after a short 6K RPM stumble that went away.

Is anyone familiar with changing to synthetics or Royal Purple causing usual odors?

 

generally regarded as a bad idea to switch from a dino oil to a synthetic on a high mileage motor....

 

I thought that was a myth in modern cars with modern seals.

 

From my understanding the issue is leaks.

Since the molecules in synthetic oil are smaller, synthetic oils can "create leaks" when really they are just finding the flaws that were already there.

Synthetics are not BAD. but on older engines, the synthetic can point out the issues that dino oil didn't find.

edit:
sorry, saw the 1/08 and thought this was a new topic...

 

Switching is a non issue now days but really on a high mileage engine the wear will already be there.

 

I like it.

I like it a lot.

 

Aww yea!
I planned on doing that once I get my new place.

What's the going rate on a drum?

 

wow,

people that should know better bumping from the dead?

royal purple good, 5w 20 not so much..

beers