Greetings:
I am interested in using synthetic motor oil. I have used it for years on all of my cars, especially my old 740s'! My 850 GLT wagon has 153,000 miles and is in very good shape! Are the oil ports small-med-large? Just in case some crud comes through, I want to be certain that no blockages occur. Again my 740s' didn't have any issues even though I started using synthetic oil on a few of them that had 300,000 plus miles at the time. I have since increased upwards to 450,000 plus miles. But I want this for my 850! Also how durable are the seals regarding synthetic oil? What say you?
best regards
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