I am not familiar with various brands of HM oil. It might be hard to get the heavy duty additive package of the Ultralife, but Maxlife lists 300 ppm moly which is a hefty dose of moly. Valvoline has told me the NAPA oils meet spec, whereas Valvoline oils exceed. A new oil analysis of the NAPA high mileage would be interesting, but last week I saw 5 quart jugs of Maxlife at Walmart for $8.97--good to stock up on about 6 jugs or so at that price. That is about $1.79 a quart, which I think Pep Boys was just running but that included getting a rebate and a 12 qt limit.
Hey, call 1-800-Team-Val and ask how much moly is in the NAPA HM oil. If they say 300 ppm(or 0.03 percent by weight), you are good, but also check calcium. Maxlife is around 2400 ppm (0.24 %wt).
Hey, call 1-800-Team-Val and ask how much moly is in the NAPA HM oil. If they say 300 ppm(or 0.03 percent by weight), you are good, but also check calcium. Maxlife is around 2400 ppm (0.24 %wt).