Mobil 1 15-50 has got to be one of the best oils on the market. I used it for 10 years until I moved to a climate too cold for it. I have used it down to 10 degrees.
However, from the other posts by people who have that same engine I wouldn't use the 15-50 even if it IS a thin 50. I'd follow the recommendations of the other posts and go thinner.
However, from the other posts by people who have that same engine I wouldn't use the 15-50 even if it IS a thin 50. I'd follow the recommendations of the other posts and go thinner.