03silverado
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- Millersville, MD
J want to change the engine oil in my M813A1 before the spring 2012 Rausche Creek rally but I'm not sure what weight oil to use I've always been told 15W40 for a diesel engine but the info placard on my passenger side dash says to use SAE 30 does anybody know if it's ok to use 15W40 don't see what it would hurt just doesn't hurt to ask