Valvoline Premium Blue engine oil
Good afternoon everyone,
Napa has the Valvoline premium blue engine oil on sale.
I noticed that the Synthetic Oil 10-30 is only good for Diesel engines.
the Non Synthetic oil 15-40 is good for both Gasoline and Diesel engines.
I have always used 15-40.
They both have the Cummins endorsement
They are both 8600 ES.
See pics below
I thought Diesel engine oil was different than gasoline engine oil.
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