[zrayr]

Originally Posted by Bob In Ct

".........Most store bought oils (Castrol, Mobil1, Pennzoil) are around 800 PPM........."

your statement is too much of a generalization. Most 10w-30 oils are around 800 ppm of zinc/phosphorus. Increased zinc/phosphorus levels can easily be found in other weights, and in 10w-30 as well if you look.

In the Mobil 1 line-up for example, levels in excess of 800 ppm can be had in:


0w-40,
5w-50,
5w-50,
5w-40,
15w-50
5w-30 High Mileage,
10w-30 High Mileage,
10w-40 High Mileage,
Mobil 1 Racing 4T 10w-40 (designed for motorcycles w/ wet clutches)
Mobil 1 V-Twin 20w-50 (designed for motorcycles w/ wet clutches)
Mobil 1 Racing 0W-30
Mobil 1 Racing 0W-50

Last time I looked, the local Wal-Marts were stocking the following Mobil 1 increased zinc/phosphorus level oils. Pretty easy to find :

5w-30 High Mileage,
10w-30 High Mileage,
10w-40 High Mileage,
5w-40,
15w-50


http://www.mobiloil.com/USA-English/...duct_Guide.pdf


Z.