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Originally Posted by jmak124
I'll take Whunter's word for it. Bought 3 - 5 qt jugs and 1 - 1 quart bottle of Mobil 1 15w-50, good for 2 oil changes for... $69.97 
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Should use the Mobil Truck and Suv oil... 5w-40 and is good for diesel, found at Walmart for the same $$. It is the same as Delvac1 which may be difficult to find.
This oil will handle the soot alot better.