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Harley Primary Oil

Which Schaeffer oil is best to use in Harley Davidson Primary Drive


I have been using your Schaeffer #705 20W-50 racing oil in my primary drive for some time now in my olderSchaeffer primary oil Harkey.  I have purchased a '07 Harley and want to continue using it but I am wondewring if there is somethig better. What do you recommend I use in the transmission and the primary drive? I have no problem using the #705 20W-50 in the transmission, but what do you recommend for the primary drive? Any other information related to this would be greatly appreciated. Thank you too for your assistance.

--Tony M.


 There are several choices for the primary drives on Harley Davidson motor cycles. The optimum product would be Schaeffer #707 20W-50 but it is also okay to use Schaeffer #705 20W-50 , 239S 30W, 40W or 50W depending on temerature.  Most Harley owners use the 239S 30W in their primary.  Schaeffer's #707 V-Twin approved oil has been slightly reformulated as an upgrade from #705.

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