The dealership that I bought my truck from gave me a lifetime powertrain warranty. My question is this, what all do I need to do to keep record of my oil changes since I change my own oil? I would assume to just keep the receipts and a log each time I do it? I know it says I must get all maintenance done when it is time and keep record of that as well. Do any of you have a lifetime powertrain warranty that can give me some pointers? Thanks!