Hello, I just ran Pennzoil High Mileage for the first time a few months back after a long life of synthetic oil, and it is time for an oil change. I was thinking about potentially going back to Full Synthetic. How about Royal Purple, or Mobil 1? Any opinions?

 

I've only used Mobil 1 in all my vehicles. Some of my vehicles actually require Mobil 1.

I figure if I have to buy it for some....might as well buy it for all!

 

All name brand synthetics are good. I like Mobil 1, Penzoil and Amsoil.

 

I continue to use Pennzoil synthetic, 99,000 miles, DD, 50 miles round trip daily

 

I ended up going with Mobil 1!

 

Good choice, GM picked and approved!

 

My engine runs smoother with Mobil 1. Been using it in all my vehicles also.

 

I use amsoil and do not like penz oil at all. Lat oil I would put in