When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
There are as many ideas as oils...I have only used HD 60 wt on my 65 pan (I am 2nd owner since 1970), but many out there will suggest other types depending on temp and what not. My dad rode a 45 flattie that he bought when he came home from his War and always used nothing but HD oil. It is the only thing I buy from MoCo what with all the other modern stuffthey offertoday. For what it's worth I will tell you it has never failed me.
I also own a 76 FLH and am restoring a 49 EL. 60 wt is all I use for my 76 and when the 49 is ready, it is the only oil I will use. HD 60 wt has always worked for me...but then again I live in Kalif where temps rarely get to the point that your oil is the consistency of maple syrup.
Slideshow: Jason Momoa's latest restoration project blends 1920s Harley-Davidsons with modern electric technology, creating some of the most unusual hybrid motorcycles ever built.
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.