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Message: [QUOTE="jbkingranch, post: 381441, member: 6002"] I agree about oil working harder. I do have the bypass on right now and have been running this system for 2 years. Only change with the oil is went from the 15W-40 to 5w-40 after moving to North Dakota. With the 15w and no RR the truck would spit and sputter at 30 degrees. Would not crank below that. With the 5w and the RR she'll bust off at -15. No ****!!! I'll see if I can get to the stealership soon and have a power balance run. If anything is wrong injector wise I'll send them to Warren and have some 190's built. Now as far as fuel pressure been told don't go over 65psi. I'm running it at 60psi right now. What's your thoughts on that. [/QUOTE]

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