so iv got a 03 6.0, with in the last 30k iv done injectors, hpop and cooler. my ipr at warm is always 25% and my icp is between 630 and 640. iv noticed when I get close to 3k miles on my oil I'll be sitting at a light and the ipr will go up to 27 to 29 and the truck will sound different. icp...