Which motor oil are you using?

[madmaxx]

Remember the additives are consumed overtime. If you change your oil every 1000 miles than I doubt you would ever have a problem on any roller engine. I like the 15w50 but the mobil high mileage 10w40 also has a little more zinc/phosphours just not as much as the 15w50. Once again for $12.00 you can buy red line break in additive and it will last 4 9 quart oil changes and you can get the zinc and phosphourus to 1400 ppm, anything above that is corrosive.

[zrayr]

Originally Posted by madmaxx

".......... Once again for $12.00 you can buy red line break in additive and it will last 4 9 quart oil changes and you can get the zinc and phosphourus to 1400 ppm, anything above that is corrosive.

don't know the particulars for other brands, but the Cam Shield product has provided a formula so you add the exact amount needed to arrive at the target zddp level.

http://www.cam-shield.com/

Z.