Originally Posted By: Carbon12
Aren't most modern OHC engines using what is essentially a flat tappet anyways? SN oils work fine in those. I am actually relieved they are going SN. I still get the slightly higher viscosity and extra seal conditioners and not have to wonder if the high phosphorous is harming the CC.
Roller rockers I thought were fine with SN, but not flat tappet where a cam lobe rubs across a flat metal surface. Perhaps there is a difference in additive requirement between this design in OHC and pushrod type flat tappet?
I have yet to find a VOA or UOA for the new SN formula, but we will see.
I hate to see all the oils becoming the same, what's the point of all the oil types if it's all meant for late model cars. M1HM was a readily available holdout for those who like to keep older stuff alive.
I know it may be a non issue, but we just don't know yet.
Aren't most modern OHC engines using what is essentially a flat tappet anyways? SN oils work fine in those. I am actually relieved they are going SN. I still get the slightly higher viscosity and extra seal conditioners and not have to wonder if the high phosphorous is harming the CC.
Roller rockers I thought were fine with SN, but not flat tappet where a cam lobe rubs across a flat metal surface. Perhaps there is a difference in additive requirement between this design in OHC and pushrod type flat tappet?
I have yet to find a VOA or UOA for the new SN formula, but we will see.
I hate to see all the oils becoming the same, what's the point of all the oil types if it's all meant for late model cars. M1HM was a readily available holdout for those who like to keep older stuff alive.
I know it may be a non issue, but we just don't know yet.