Mobil 1 15-50 syn. I have heard that you want to keep your viscosity low so the
oil gets into small places???
but I do not follow that line of thinking. after a couple of laps at the track the
oil is nice and hot and it should flow like melted butter. Now if you are going to just drive on the street. I would tame it down to 10-30, or 15-40 tops.................
Keep the shinny side up..................
Brian