100% agree with you, Richard. Ever since seeing fresh Shell Rotella T 15w40 (a very popular diesel oil loaded with detergent) turn black within a few miles on one of our Ferrets, I've had my doubts about the wisdom of using this oil in our old engines.
And since then, I've seen how much sludge accumulates in the oil pans of these old engines. In fact, I suspect the oil pans were made so deep just to provide a nice quiet place for particulates, varnishes, etc. to settle down into out of the way to somewhat compensate for the lack of filtering. Dissolving this stuff back into a high detergent oil is bad news.
Malcolm
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06-02-18, 22:10
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