Does anyone know the rating for Pennine Heritage Classic 20W/50?
I want to see if it's comparable to the oil I'm using at the moment, which is marked: 'SL/CH-4' and '1300 zinc as ZDDP'.
I did email Pennine's customer service department but didn't get the courtesy of a response - not a good way to win customers!
Pennine oil - quality rating?
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