I have a 2011 Chevy Silverado 2500 with 6.0 Gas. Currently I am at 49,500 miles, I bought the truck used a year ago and promptly changed the oil so I knew which oil is in it and which filter is on it. I have been running PP for about 7500 miles and the OLM says I have 25% left. I want to change the oil soon and I am looking at switching to Delo 400 5w30 because it looks like a more robust oil. Am I being paranoid of an engine failure or is this a good oil to run in this truck with this engine. I also have a case of NAPA synthetic 5w30 in the barn that I was planning on using if I don't use Delo. I use NAPA Platinum filters. Any other thoughts or suggestions? Thank you - Joel