UOA of Pennzoil Ultra Platinum 5w-30 in my 2012 WRX. I ran it for 7 oil changes (sampled every other one), but this most recent change was Pennzoil Ultra Platinum 5w-30, which should be the same formula as the old Ultra.
As you can see, I only ran this oil for ~2300 miles and it sheared down well in to an SAE 20w. Glad I drained it when I did. The previous samples mostly stayed in grade, so what is the difference you might ask?
For the previous samples, I drove the car, very, very gently. Not really enjoying it at all if I'm honest. In this most recent sample, all I did was hit full boost at least once a day. That's it. Nothing more than that. I just wanted to hit full boost, once a day, on principle. I know that sounds silly, but I was just fed up with walking on egg shells for the car and decided to drive it and enjoy it.
So, what does that net me? Well, apparently Pennzoil Ultra Platinum 5w-30 will shear at least 1.0 cSt more if you actually drive the car spiritedly.
My concern: Tin is up to 6ppm from 1ppm on the previous sample. I e-mailed Blackstone about it since they didn't comment on it. Lead and Copper are still dropping with every sample, so I'm not going to jump to any conclusions just yet. I wish now that I had sampled every OCI instead of every other one, but the engine seemed to be doing well.
Thoughts, comments?
P.S. I switched to Motul 8100 X-Clean 5w-30 on this oil change, and I might sample it at 1,000 mi and send it in to keep an eye on it.
As you can see, I only ran this oil for ~2300 miles and it sheared down well in to an SAE 20w. Glad I drained it when I did. The previous samples mostly stayed in grade, so what is the difference you might ask?
For the previous samples, I drove the car, very, very gently. Not really enjoying it at all if I'm honest. In this most recent sample, all I did was hit full boost at least once a day. That's it. Nothing more than that. I just wanted to hit full boost, once a day, on principle. I know that sounds silly, but I was just fed up with walking on egg shells for the car and decided to drive it and enjoy it.
So, what does that net me? Well, apparently Pennzoil Ultra Platinum 5w-30 will shear at least 1.0 cSt more if you actually drive the car spiritedly.
My concern: Tin is up to 6ppm from 1ppm on the previous sample. I e-mailed Blackstone about it since they didn't comment on it. Lead and Copper are still dropping with every sample, so I'm not going to jump to any conclusions just yet. I wish now that I had sampled every OCI instead of every other one, but the engine seemed to be doing well.
Thoughts, comments?
P.S. I switched to Motul 8100 X-Clean 5w-30 on this oil change, and I might sample it at 1,000 mi and send it in to keep an eye on it.