Flat tappet guys and others who desire extra zinc/phos anti-wear additives in their motor oil, may want to take a look at this. I just got a Staveley Lab report back on a brand new bottle of Valvoline conventional petroleum (dino) 10W40 4Stroke Motorcycle Oil. Check it out below:
In parts per million (ppm):
Calcium = 1849
Phosphorus = 1075
Zinc = 1154
Moly = 0
TBN = 7.1
For reference:
Calcium : Detergent/dispersant additive
Phosphorus: Anti-wear additive
Zinc : Anti-wear additive
Molybdenum: Anti-wear additive
TBN (Total Base Number): reserve alkalinity, which controls
acid formation as a result of the combustion process
You can get this Valvoline Motorcycle oil , also in 20W50 weight, at Kragen, Autozone and a few other auto parts stores.
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For a comparison that I got from Staveley earlier in the year, take a look at their lab report on Royal Purple's $14.00 per quart, full synthetic, XPR Racing Oil
Calcium = 3039
Phosphorus = 1338
Zinc = 1421
Moly = 204
TBN = 10.9




