OK guys, after some delays because I didn't go to Fort Wayne when I originally planned, here is my latest UOA. Based on what I am seeing and what dnewton has previously observed, I do agree the combo of PUP, my engine/filters, and the Napa Platinum are serving me well and I likely will try to hit 20k on the current OCI. I do understand that "some" of the slight thickening would be partially combatted if I needed to add any oil at all, but when it starts off at the top of the hash marks and 17k later is at the same point (with a 2.9 TBN no less!), I'm not going to complain.
85ish% is what I consider highway- I drive 21 miles each way to work, essentially nonstop at speeds between 30-65. Rest is in-town but this OCI had about 8500 miles in 2 months driving for work... most of it 75+mph on interstates, and finished the OCI with a 1700-mile trip to VA and back. One thing I forgot to tell Blackstone and you guys might have some input... about the first 10 tankfuls (~5k miles) of this OCI I used some synthetic TCW3 oil at 1oz/5gal, and then maybe 3-4 more times after that.
My question is, could the TCW3 oil have been the reason why the viscosity crept up some? I see that it didn't help wear rates or really mileage either, so I won't be doing that anymore most likely. Anyways, I know there are lots of Napa Platinum "haters" here... the 12k run was a FU filter, 13.6k was Amsoil EaO34, and this run was the Napa Platinum 41516... longest OCI yet and the insolubles are the lowest they've ever been... What's up with that? Enjoy!
85ish% is what I consider highway- I drive 21 miles each way to work, essentially nonstop at speeds between 30-65. Rest is in-town but this OCI had about 8500 miles in 2 months driving for work... most of it 75+mph on interstates, and finished the OCI with a 1700-mile trip to VA and back. One thing I forgot to tell Blackstone and you guys might have some input... about the first 10 tankfuls (~5k miles) of this OCI I used some synthetic TCW3 oil at 1oz/5gal, and then maybe 3-4 more times after that.
My question is, could the TCW3 oil have been the reason why the viscosity crept up some? I see that it didn't help wear rates or really mileage either, so I won't be doing that anymore most likely. Anyways, I know there are lots of Napa Platinum "haters" here... the 12k run was a FU filter, 13.6k was Amsoil EaO34, and this run was the Napa Platinum 41516... longest OCI yet and the insolubles are the lowest they've ever been... What's up with that? Enjoy!