11-28-2021, 10:41 AM
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CC Member
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Join Date: Feb 2006
Location: Gilroy,
CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
Posts: 2,741
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Something that is not intuitively obvious is that the Mobil racing oil in 0W-50, like Morris uses, has among the highest ZDDP levels of any oil you can buy today. I believe the numbers are 1300 ppm possibly higher. This is very good for flat tappet cams and lifters.
Most of the oils once you get to the 0W-50 threshold will have higher ZDDP levels. FWIW (and it could be a lot) Mobil 1 seems to be the highest. Castrol used to offer a 0W-60 high zinc oil for super car applications but I haven't seen it for a while so the 0W-50 oils (especially Mobil 1) get the nod.
If you want to be certain research their zinc levels before buying. If the 50 and 60 weight viscosities leaves you a little timid, Mobil 1 also has a 0W-30 Racing oil with the same zinc levels in it.
Ed
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Last edited by eschaider; 11-28-2021 at 03:32 PM..
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