Dodge Cummins Diesel Forum - View Single Post - First Oil Change on 2018 Cummins dually crew cab
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post #21 of (permalink) Old 12-21-2018, 12:10 AM
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I did my own oil changes
the first one at just 1000 miles and went right to full synthetic

I believe ring seal could be the only possible reason to start on petroleum based oil and even that would be questionable.... Certainly by 50 miles the ring seal is complete especially on a diesel, likely done by 20 miles

I build motorcycle race engines and get complete ring seal on full synthetic in sub 20 miles....... and run all these on full synthetic from initial assembly

[I]2017 3500 SRW Trademan Crewcab Longbed, 6.7L, 6spd manual, in Hills Green- no stupid "luxury" stuff needed. I like my rubber floors and clean interior
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