Join Date: May 2019
Thanked 4 Times in 4 Posts
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More power after 1st oil Change
So I had heard about this but I was hesitant to believe it. First, Ii heard guys saying that they could chirp the tires on their HO Cummins Rams. Well mine never chirped. Then I started asking around about why there's no break-in on the engines. Most folks said they just built them to not need it. That seemed hard to believe but OK. Then someone said that they tune it down when they are new to ease wear during break in and that the tune opened up performance after the first oil change. That made a little sense. So Yesterday, I changed the oil at 3300 miles. I know they supposedly dont need it, but on every other new vehicle I've bought, I change at 700 and again at 3700 before beginning standard OCI. So I put 3 gallons of Mobil 1 Delvac 5w40 and a Wix XP filter on and I go to drive it...CHIRP. Noticeable performance boost. The butt dyno says a ton more power. So in reality, maybe a little more power. But the tire chirp was not made up. It was definitely tuned down before. I don't know how they would do that. Maybe when I reset the oil life? Or some combo of the reset along with oil life sensors? One other concrete thing I noticed was my oil pressure went way down. Before it ran between 49-53 PSI. Now it runs 34-50PSI. Oil level stayed the same (right up to the top of the "safe mark". That could just be a property of the new Mobil 1 Delvac oil but I doubt it. Maybe that’s it...maybe they add a viscosity thickener from the factory that bumps up oil pressure and limits performance until you get the standard grade oil in it?
My 1st Ram: 2019 Laramie 3500
6.7 HO Aisin AS69RC. Borg Wagner 44-48 4x4. 12" AAM Rear end. CCLB. Single Rear Wheel. Max Steel. 295/70/18 (35x12) Mickey Thompson MTZ P3. No lift/no level.