Quote:
Originally Posted by jhein
From what I could see the levels were not the same in all viscosities and many were in the 800 range which I think is too low. That's why I asked about just getting the viscosity you want/need and then using an additive.
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They aren't supposed to be the same. That's why I provided the list with the specifications.
Some oils have the ZDDP levels for flat tappet cams, others aren't designed for them.
800 is too low.
Any of the one's I specifically listed will work for your desired application. A 0W40 and 5W40 will cover everything a 10W40 or 10W30 will cover, only better. For those that want to use a 20W50, the 15W50 will cover, only better.
I've run the 0W40 in my wife's '72 Camaro for nearly 20 years. I've run 15W50 in my 'GTO since I put the 462 in 2013.
I've driven both cars in the winter months as even with the 15W50 as it has a pour point much lower than any 10W30 or 10W40 conventional oil.
The GTO has been driven in all 12 months of the year (nice sunny days only during the winter).