50/50 blend of PU 5w30 & PUE 5w40

[A_Harman]

From Polaris Labs:

No wear metals present.

Contaminant Metals:
Silicon: 1 ppm
Sodium: 3

Multi-Source Metals:
Molybdenum: 54
Boron: 110

Additive Metals:
Magnesium: 22
Calcium: 2293
Phosphorous: 743
Zinc: 866

KV100: 11.1 cSt
TBN: 8.62
Oxidation: 7
Nitration: 5

I'm a bit disappointed in this VOA.
I was hoping for Phosphorous more in the 900 range. Need to go back and look at VOA's for PU 5w30 and PUE 5w40 to see if it's close to an average of the two.

I was expecting KV100 to be 11.6.

I have had this blend in the engine for a couple of weeks, and the piston slap is less than with GC.

 

[Quattro Pete]

Originally Posted By: A_Harman
I was hoping for Phosphorous more in the 900 range. Need to go back and look at VOA's for PU 5w30 and PUE 5w40 to see if it's close to an average of the two.

PU 5w-30 API SN that pqia tested in 2013 showed phos of 744.

PUE 5w-40 that I tested back in 2010 showed phos of 822. Not sure if anything changed in the add pack since then...

 

[A_Harman]

Yep, I searched for VOA's of PUE, and the only one I found was yours from 2010. The average of the two you list is 783, so I'll get over my disappointment concerning ZDDP content.

 

[dailydriver]

I would've thought that the TBN would be a little higher.

 

[BrianC]

If you are looking for a 5w-30 thats a bit heavier with 900+ phosphorus, look at this VOA of Mobil 1 HM 5w-30.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3323607/1

 

[A_Harman]

I think the TBN will be OK for a 9k-mile OCI, especially considering that the engine is now consuming oil at 2500-3000 miles per quart.

 

[A_Harman]

Originally Posted By: BrianC
If you are looking for a 5w-30 thats a bit heavier with 900+ phosphorus, look at this VOA of Mobil 1 HM 5w-30.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3323607/1


I've run M1 5w30 HM before and really liked it, but I "got assimilated by the BITOG", and started trying different types and blends of oils. I'm not on a quest for the "perfect oil", mostly I'm watching for differences in consumption and piston slap. Once I get done working through my stash of PU/PUE, I may just go back to M1 HM. (But that'll be about 2 years/36,000 miles of driving.)