Since I read about the accelerated destruction of flat-tappet cams when used
with the new low-ZDDP oils, it solidified my habit of only using Castrol
HD30wt. I'd always avoided the multi-weights because of the know tendency
for the additives to add to 'coking' problems on hot turbo bearings. From
what I've read, once the cam is broken in with old fashioned ZDDP rich oils,
it is less of a risk to switch over to the modern oils. But I'm just
paranoid and won't change.
> I read that a non-API oil is usually so because it contains too much of
> additive ZDDP (Zinc Dialkyl Dithiophosphates) to be certified. I
> the API limits the amount of ZDDP additive allowed in the oil because it
> shortens the life of the catalytic converter. Now, most if not all of our
> LBCs don't have catalytic converters, and the added Zinc in non-API oils
> supposed to reduce wear on the engine. So, I wonder if any lister is
> presently using a non-API oil, synthetic or not, and what they think?
> Any oil expert on this list?