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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.

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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

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