Originally Posted By: Shannow
Garak, my limits are a bit further than your, but still stop at 1,400, which seems to be where the piston aircraft engines ran into strife, with as per your discussion, lower TBNs etc. than PCMOs.
That's why when I was wondering about RP HPS 5w-30 for my old F-150 since it's now on the shelf at my supplier (yeah, like I'd really put a synthetic in there, much less a boutique
), I found a VOA on here that said about 1700 ppm zinc. I just about fell off my chair.
So, considering that isn't really a race oil but is suitable for longer drains, I really wonder about that level. Is it a lab error, or is RP being nuts, or do they know something we don't (as in we, the non-formulator posters)?