Originally Posted By: Chadastator
I've got an '01 Grand Prix GTP with 122k, and I just ordered Auto RX for use in it. I use Mobil 1 synthetic in it now. Will switching to dino oil for the required 6k miles (Auto RX) damage anything?
If I understand your original post, you have ordered the Auto RX, so go ahead and use it with confidence. Dino for the RX period will not hurt anything. The car didn't require synthetic from the factory, did it?
BUT: based on your photos, I suggest not adding the Auto RX when you first fill the engine. After you put it back together, add a fresh change of dino and run the engine until it gets hot. Then drain the oil, change the filter, and add new oil and your RX. I have always done a flush like this after opening an engine to antifreeze or a lot of junk (like your intake removal).
Are you changing the supercharger oil while the engine is apart? There was a discussion about that on here several years ago. I think GM dealers will carry that often-overlooked fluid. I'm not sure if there are any substitutes.
Good luck. Let us know how it goes.