JDTECH24
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6.0 vs. 8.1liter engine
JDTECH24 replied to carload4916's topic in 2000-2014 Silverado HD & Sierra HD
I have heard they say 5w-30 For the fuel mileage. I run 5w-30 valvoline full synthetic and I can run 5000 mi with no issue or adding oil in an 07 new style 2500hd ext cab short bed 4x4 with the 6.0 and 6 speed transmission.
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