I don't know if any of you guys have cared enough look into it, but if you use the Mobil 1 oil filter part number M1-101, you can swap in an M1-201 for about twice the capacity and the same price. My oil pressure at 1000 rpm went from 35psi up to about 55psi after the oil change. That part is for the 4.3 but I think the 4.8/5.3 will work the same way. Worth a check at least.