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Dave Plowman (News) Dave Plowman (News) is offline
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Default semi synthetic V mineral oil ...

In article ,
Jim at the Common Riding wrote:
bring back Castrol 20/50 for all cars ...


But which one? Snag with oils is the formulation changes, but the name can
stay the same.

And a 20/50 is going to waste power/reduce engine efficiency over a
thinner oil.

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