Use Victory 20W40 Synthetic Blend 20W40 engine oil for all temperatures. If Victory oil is not available, use a high quality
20W40 motorcycle designed for use with wet clutches (such as those with a JASO MA rating).
Do not put chemical additives in the oil. Victory motorcycle oil has been specially designed for this application.
Additional additives are not necessary and have not been approved by Victory Engineering
2006 KP Custom
2011 Blue XC
2009 Vision Tour Premium (Black)
2007 Hammer S
2005 Custom KP
2002 Touring Cruiser Deluxe
2000 Custom C
Last week, I asked the Owner of Volusia Motorsports the same question. His answer is in this video: