Go read what they say on the LN engineering site..
My engine rebuilder said to use Castrol Syntec which I get cheaper than Mobil1 at several sources in Canada. I tend to listen to those that rebuild. Besides, the cost to rebuild or replace is rather high compared to the cost savings. PO had overfilled the crank with 4 extra litres. I got a deal including the cost of a rebuild ...
But, it's your car and your choice.
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2002 Boxster S Seal Grey
2010 Ford F150 FX4 Luxury
Retired after 38 years with the same company.
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