Re: Pennzoil Platinum or Pennzoil Ultra???
FWIW. My oil change history: First, Mobil 1. Second Pennzoil Platinum. Third, Pennzoil Ultra. Fourth, Ultra.
Current milage: 15.3K.
Will get my next one in the next week or so, when I take the time to get it done. Will be Ultra.
I have not had any UOA's, but I will take a sample and submit for a UOA just before this upcoming change.
Edit: If it ever came to a challenge over warranty issues, I would make the argument (successful or not) that "Well, it was a Buick dealer that
installed the oil, so I find him as liable as I am".
2016 Enclave, FWD, Premium Group, Dark Chocolate Metallic, Choccachino leather, SunRoof/Skylight, Captains Chairs 2nd row, Rear Seat Entertainment, 20 in. Wheels, Trailering Pkg. Hit the Road and Cargo Convenience <br /><br />There are two kinds of people in this world. SAILORS!. And those who wish they were.