Hi All. Just picked up a new 2019 Chevy 2500 crew cab standard bed. I had a GMC 2500 gasser but it struggled to pull my toy hauler RV in hilly terrain. This is my first Diesel. I have 3 free services at the dealer so I think I'm good with that for a while. I do have a question-Should I avoid any particular brand fuel stations? I heard some of the bigger truck stops have contamined fuel. Also, should I warm the truck up in the winter?