I have a bit of a dilemma. Which oil should I run? I know the car calls for 0w-20 but it came with a fresh change of 5W-30 in it for whatever reason from the dealership I bought it from. Is it okay to leave that 5W-30 in there? Should I just always run 5W-30 or should I go get it changed to 0w-20? I've seen so many mixed things on here. Some people say there is no problem running 5W-30 in the 2018's. Others say to run 0w-20. Any insight would be great please. Will it hurt anything to run 5W-30?!?