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jmcarter · 02-13-2024, 11:38 AM

What Keith said, I always used Rotella 15W-40 but opinions vary wildly. Just be sure to change the fuel filter every other oil change. The Cummins 5.9 is an awesome workhorse.

02-13-2024, 11:38 AM	#3
jmcarter VIP Member Join Date: Dec 2008 Location: Richmond Hill GA (and Port Ludlow WA) Posts: 4,127 Likes: 1,993 Liked 2,714 Times in 855 Posts	Re: '06 Dodge Ram Diesel Dually 3500 What Keith said, I always used Rotella 15W-40 but opinions vary wildly. Just be sure to change the fuel filter every other oil change. The Cummins 5.9 is an awesome workhorse. __________________ Jim Carter 2340 Super Stock 2340 SST/2340 Stock