I do know that the indeopendant garage down the road from me bulk buys a "very good oil" which does a lot of cars, but they also check the specs of any car and get in whatever is needed.
I hope that snippet is of use to someone
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1994 850 2.0 bought at 32,000 miles used daily now 45,000. Still like a nearly-new car 
2004 filthy polluting diesel VW
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