Kris01 wrote on 11/06/15 at 18:43:19:I agree Dave. WD is using 60 wt oil. It was just a thought. Personally, I wouldn't do it.
No, that's what I run in big air cooled bikes (Shovelhead or older) in the summer. The Slopokis get 15W40 or 20W50... Can't find good heavy weights anymore, not even HD dealerships carry 60 or 70 around here. And as tiny as Savage oil passages are, going over 50 would probably frag the top end anyway.