Somebody has asked me what oil to use in his NP203 from a Blazer. He was confused as several suggestions had been made. ATF, Motor oil (10W40), Gear oil like used in axles...
I always thought it was 30 weight non-detergent oil. I would say any motoroil would be fine, but gear lube is a definate no-no. I even know of people running ATF during the cold winter months.
Ray
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