mechanic1 Posted June 29, 2014 Share #1 Posted June 29, 2014 Is Castrol 20w-50 still friction modifiers free? Went to get some today and kind of got spooked...different looking container...and said something like..."Superior Sludge Protection tech..." Link to comment Share on other sites More sharing options...
friesman Posted June 29, 2014 Share #2 Posted June 29, 2014 there is a round crest on the back of the jug that has "energy conserving" written inside the borders of the ring. Brian Link to comment Share on other sites More sharing options...
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