>Mobil now claims their 15w-50 is now engineered for older vehicles...
>It has a lot of ash (1.2%) to prevent
ring
sticking and oil analysis is showing it be well over 1,200 PPM zinc
The problem isn't only zinc, the phosphorus is just as important. that is why
the ZDDP additive or oils that have high zinc AND phosphorus.
Peter Arakelian - '71 TR6, Daily Driver
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