Dodge Cummins Diesel Forum - View Single Post - First Oil Change on 2018 Cummins dually crew cab
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post #22 of (permalink) Old 02-16-2019, 10:03 AM
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Effective on all 2014 and newer 6.7 Cummins. They all come from factory filled with synthetic 5/40 due to they can not verify at time of build what climate it will be shipped to. Verified by Cummins engine supplier. Note, I have used T6 for 10 years without any abnormal noises!
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