New 2015 Silverado and have put nearly 3,000 miles on it and planning first oil change. I have traditionally been a conventional oil guy but ready to go synthetic. Mobil 1 is what I am considering but would be grateful for comments on oil and filter. Here are the basics. 1) Vehicle is 2015 Chevy Silverado LTZ 5.3L V8 ECOTEC3, auto trans, trailer pack, axle 3.08. 2) Manual recommends dexos1 typ SAE 0W-20 (5.3) ACDelco dexos1 synthetic blend, change at 3,000 miles. 3) I live on the gulf coast near Houston. 4) Not an easy or slow driver, so I guess it's hard and fast, LOL! 5) I drive interstate 100 miles round trip to work with a bit of driving around town daily. 6) No known problems yet, less than 3,000 miles so far.