[CFMCNC]

Lets start with the type of oil,synthetic or dinosaur,If the engine has marginal to extremely low tension rings or is run without valve seals,the synthetic oil is less likely to cause detonation than the hydrocarbon oil,we only run without valve seals when we put something special in the oil that we want to get into the combustion chamber.Most good synthetics eclipse hydrocarbon oils in temperature affected breakdown.ZDDP is necessary for flat tappet cams,1200-1400PPM is the required range,most auto parts store oils are under 800PPM,It is still good to have higher ZDDP ppm but not necessary with a roller camshaft ,although some of the high rpm,agressive cam big valve spring engines we deal with show better wear results with high ZDDP.The Molybedum content is also importent as the oil mfgs.have removed ZDDP they have increased the moly ppm.problem being that too much moly with an agressive high valve spring pressure cam can cause the needle bearings to glide instead of roll and then flat spot and failure,this has been the cause of many roller lifter failures,and that brings us to the elimination of the needle bearings,It is the best development for our industry.Isky EZ Rolls go into almost every engine we build.Back to oils.My wifes Saturn has Mobile 1,My S-10 Blazer has Mobile 1.My 2005 Duramax has pre 2007 Rotella in engine and Allison in trans.Our racing engines run several different oils depending on need. We use Brad Penn ,Joe Gibbs,Royal Purple and LAT .We are having oils tested by more than one lab.There is a website called Bob The Oil Guy,lots of test input there also.Lastly ,Viscosity,the days of 20-50 are gone,just about every type of motorsports is using lighter viscositys with sucess.Bill C.