Rooster's Harley-Davidson® Motorcycle Products
Come on, we've all asked this question: 'What oil is best for my Harley-Davidson® motorcycle?'. Well...here's your answer!
Car oils are cheaper than motorcycle oils because they don't have to work as hard.
Just like there's no "free lunch", a cheaper car oil has lesser ingredients, and won't protect a motorcycle engine as well.
Lot's of riders, and even some "in-the-know" magazine writers, say all oil is good enough.
WRONG! Engines, drivetrains and demands are different from vehicle to vehicle, and so is the lubricant required.
Take power: maximum engine output per liter for motorcycles is typically 1.5 to 1.8 times that of automobile engines. Similarly, r.p.m.'s at maximum output are 1.3 to 2 times that of most automobiles. Also, motorcycle engines, being small and lightweight, have smaller thermal capacity - the result is that motorcycle engine oils can reach temperatures as high as 320*F.
Harley-Davidson® SYN3® lubricant contains higher quality shear stabilizers that allow us to use this oil in both engine and gearbox. It also has higher volatility to control consumption in an extremely hot, air-cooled engine. Also, SYN3® lubricant has special additives to better prevent cam wear and oxidation in the lubricant's high heat environment.
So does it make sense to skimp on your motorcycle's "health" to save a few dollars per oil change? NO WAY! Using a lesser oil can and probably will cost you much more in the long run!