Quote:
Originally Posted by J Franklin
I wouldn't use straight weight oil nor 40 wt. 10-30 or 10-40 are my choices for good flow and long engine life.
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I fully agree. And just about any brand will do. Remember this is a flathead that is already broken in with low valve spring pressures. I don't know the exact numbers, but I'll bet any currently available automotive motor oil has more zinc than what was in the oil when these engines were new. I am now buying my motor oil at Dollar General for less than $3.00 per quart. The only thing is that it says "Do not use in any vehicle manufactured after 1985". That's good enough for me. I just wish they carried filters.