Well here's the deal I have a case of royal purple 10-30 and possibly unlimited free access to more is there any dis advantages vs running the 5-30 that I usually run?
If you have a free everlasting supply of Royal Purple 10W-30, USE IT! Even better if you tell me it's the older API SL formulation, or the newer HPS.
Why 10W-30?
Thanks UB and Sid. I'll be using the HPS 10W30 in the Cobra now. Any ill effects on cams, say Crower Stage 3's?
Thanks UB and Sid. I'll be using the HPS 10W30 in the Cobra now. Any ill effects on cams, say Crower Stage 3's?
HPS is extremely robust.
Can Royal purple HPS harm the emissions system in my stock 2012 GT? Why does ford reccomend 5w-20 for most weather conditions when all the enthusiasts on this forum and one's similar to it with any knowledge in oil viscosity advise against it?
:shrug:
CAFE laws, and no other reason. The bean counter want to pay less fines to the federal government.
Royal Purple HPS is a true synthetic base stock which naturally has a lower NOACK Volatility (evaporation/burn off). It evaporates 50% less than Motorcraft 5W-20, so what means having a higher level of ZDDP (Zinc and Phosphorous) will not be any more detrimental to your cats than Motorcraft 5W-20 with lower levels of ZDDP.
Phosphorous is poisonous to catalysts.
There has been a debate with the API (American Petroleum Institute) to take into consideration NOACK Volatility when determining maximum ZDDP ppm in a lubricants formulation. It makes perfect sense, however....since the API is biased on large oil companies using lesser base stocks that have higher NOACK, the argument falls on deaf ears.
aka politics
I thought the inclusion of those 2 elements was more important during the new engine break in period? Benefits?
Yup especially for flat tappet cams..