2005 Buick LaCrosse CXL, 3800 Series III, Pennzoil Platinum 5w30, 3921 miles

[KansasBuickFan]

Here is the most recent UOA for my 2005 Buick LaCrosse.

Good report! I'm happy that the Pennzoil 5w30 did not shear down to a 5w20, unlike the last oil I ran, which was STP full synthetic. The silicon is out of the system too and no evidence of coolant.

05 LACROSSE-230318.png

• KansasBuickFan
• Apr 4, 2023

Link to previous analysis:

https://bobistheoilguy.com/forums/t...i-stp-full-synthetic-5w-30-3204-miles.362250/

 

[kschachn]

Your previous report had a problem with fuel dilution not mechanical shear. That’s independent of the oil.

 

[fantastic]

Nice report! Pennzoil has good availability everywhere.

 

[Lubener]

Nice report. I am not sure if I am disapointed with the oil's TBN. I would have expected a little higher for less than a 4k mile run...

 

[KansasBuickFan]

Nice report. I am not sure if I am disapointed with the oil's TBN. I would have expected a little higher for less than a 4k mile run...

I seldom go beyond 4,000 and usually not beyond 3500, so the TBN was OK for me. I'm running a Frankenblend right now. After that it will be PPHM most likely, or maybe PP Euro L.