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Substitute Lube.....

Moderators: Curt!, Pa

Post Wed Mar 14, 2007 3:37 pm

Posts: 5
Location: Louisiana
What is a good Auto Parts store substitute for H-D primary case lube?

Post Sat Mar 31, 2007 10:59 pm

Posts: 1538
twinkeez run the same oil in all 3 areas, motor/tranny/primary.

since oil is the cheapest thing on a HD, i don't scrimp on it..

Post Wed Aug 12, 2009 1:14 pm

Posts: 24
Location: My-am-mah, Flor-a-duh
I use AMSOIL SAE 20W-50 Synthetic Motorcycle Oil (MCV):

It may cost a little bit more but I think it is worth it. Living in south FLA things get pretty hot. Although I don't have any numbers to back it up, I think my RK runs a bit cooler with the AMSOIL syn. In standard ASTM testing AMSOIL performs better than the HD syn3 and HD 360 (and just about everything else): ... Paper.aspx

1946 knucklehead
1976 shovelhead
2006 road king

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