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Just thought I'd post the results. First sample was the M1 0w20 AFE, the second sample was the M1 0w40 and the third was M1 0w30 AFE. I did notice about a 1mpg drop going from the 0w20 to the 0w40, but the reduced wear was worth it to me. I tried the 0w30 for curiosity to see how the fuel...

I have a 2015 Silverado with the 6.2. Owner's manual calls for 0w-20. For the first time instead of the truck motors being based off the corvette(or vice versa) the 6.2 in the truck is identical to the long block the C7 corvette. The corvette owners manual says to run 5w-30 for normal use or for...