Trying to decide if 30 wt non detergent oil or regular oil is better for a 1950 216 motor in a 50 3100. Engine as far as I can tell is original, odometer hasn't worked in years so I'm imagining it has well over 100k miles if not more.
Any one have any advice on what to use, don't won't to add something that'll will screw it up.
Previous owner used regular 30 wt oil.
