I went for my first oil change, which the dealership does for free, on Tuesday. Anyway, the 21 Titan called for 0W-20 (they used 5w-30) and in the manual it says that not using the proper weight oil will void the warranty. I called out the dealership on the improper oil being used and they are supposedly going to change it out and put the correct oil in. Now I'm concerned. Who do they have working for them that they would put the wrong oil in a brand new truck? Also, when I asked about the warranty they said it won't effect it. How can I know they do it right this time and not just print out new paperwork? Do I have a reason to be concerned or am I being overly paranoid?