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Yeah, I'm not sure what he meant by that aside from the fact that plastics are made from petrochemicals. Not sure I'd read too much into that one. Everybody has a degree of bias and this could've been his slam against Mobil 1 to prove a point with Delo and Rotella.


I've used Mobil 1 0w-40 now for quite a while and my Blackstone reports have been great. Here's some numbers to compare with JohnnyB's Rotella report with 6k miles on the oil and 136,535 on the engine:

Aluminum - 3
Iron - 8
Lead - 8
Tin - 1
Copper - 3
Moly - 78
Zinc - 1018

I usually don't like getting into oil discussions as they are largely useless. Just put any good oil in it and change it as spec'd. Used oil reports are mostly a hobby with me but they can also give an alert to a particular problem. I buy Mobil 1 because it's readily available, price isn't too bad, and the 0w-40 pretty much solved my lash adjuster noise on start-up.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles