Home › Forums › Stay Dirty Lounge › General Automotive Discussion › Which weight of oil should I use › Reply To: Which weight of oil should I use April 15, 2020 at 8:52 pm #954280 RichParticipant You should check your oil filler cap, it usually says on there, The under hood sticker usually says and you could check your owners manual. if you dont have ny of those, I find the AMSoil website to be a great source.