Hey guys i bought a new 2015 gmc sierra 1500 with the 5.3 ecotec3. Its been awhile since I've owned a gm product, so what are others useing oil and filter wise? I read an online owners man. and it said use 8.5 qt of dexos1 approved 0w-20. Also I searched filter part numbers and I get back 2 numbers an acdelco pf47 and a pf47e. I'm pretty shur that's the part number but I know one had a "e" at the end. Can someone shed some light on this. I was planning on I useing vsp and a acdelco filter but I'm open to suggestions from the gm guys out there.