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In the last year I have found about 60 qts of left over older formula SJ and SL at various stores.

So tonite I was in a Walmart checking the back of the shelves. I noticed they carry Royal Purple, it has a SL rating. The Mobil 1 'High Mileage' oil also has a SL rating, not SM like other Mobil 1 formulas. Anyone know the Zn-Ph ppm of these two?

I prefer not to run diesel oil because of too much detergent and the racing oil has too little, requiring more frequent oil changes. Something I can get locally off the shelf would be great if High Mileage Mobil 1 has enough ZDDP.

The straight 30wt Castrol also has a SL rating, other 30wt oils I have seen in the past is still SL oil.



Mobil 1 10-40 High Mileage, SL/CF rated:

PHOSPHOROUS: 860
ZINC: 1035

I’ll keep looking for a up to date UOA/VOA for Royal Purple

CompSyn



Here is VOA info I found on Royal Purple API (SL) Rated 5W-20 motor oil.

Zinc: 666ppm
Phosphorous: 563

CompSyn

BTW, check out the New AMSOIL Group Discount for moparts.com members.




Thanks CompSyn .
The Mobil 1 HM doesn't look too bad, better than the other SM oils. Guess it would do in a jam but I'll find a local Amsoil dealer when my older SJ and SL oil supply is gone.
Royal Purple , appears they need to upgrade their labels to SM.


I keep seeing GM EOS has been re-released, only with another part #.
Whats the new # and is it still ZDDP or has it been changed to Moly?




New GM EOS part # 88862586

This new stuff is listed as “engine assembly lubricant”.

Zinc: 4843ppm
Phosphorous: 5099ppm
Molybdenum: 4ppm
Calcium: 31320ppm
cSt Viscosity @ 100C: 22.09

CompSyn