Red Line Synthetic oil Oil Sae 20W50 Full Synthetic V-Twin engines Fits: > All Harley Davidson Engines
- Designed for the latest Big-Twin motorcycle engines that specify 20W50 motor oil, including including Evolution, Twin Cam, and aftermarket engines of similar design
- Superior film strength through the use of ester base stocks for protection and ring seal
- Extended drain intervals over other brands due to higher quality basestocks and excellent dispersants
Why is it wrong to just use motor oil in the transmission? Simply put, motor oils contain additives specific to keeping contaminants in suspension. Since transmissions don't have to deal with the byproducts of an internal combustion engine, wouldn’t you select gear oil with chemistry that is optimized for the conditions? The same goes for the primary case. It is safe to say that the problem with a compromise is that can't do any one job really well.
part numbers
- 42504: 20W50 Motorcycle Oil - quart
