I got my Ram Big Horn, Quad, Granite, Eco-D about a week ago. It's the finest truck I've ever driven. For the first 500 miles I'm averaging 24.7 mpg for mixed driving. I have a question about oil pressure. My oil pressure when the engine is at operating temp is 15 psi at idle. While driving, it reads in the high 20s and low 30s. Is that in line with what you longer term owners are seeing? Thanks!