Harley which oil to use

The tractive coefficient, which is the measure of the case with which a lubricant facilitates sliding, is essentially the same for both petroleum oils and synthetics. Synthetic motor oils are also used in many production and racing cars that have sophisticated roller follower technology and they have absolutely no problems whatsoever with roller bearings not turning.

Slipperiness and Wet Clutches. The most notable differences between the two products are in the 4-ball Parameter 3 wear test. In determining which questions to answer and post on this site, we strictly adhere to ExxonMobil's policy of not disclosing proprietary formulae or performance-testing information; nor will we address inquiries requesting comparisons with competitive products.

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AMSOIL Shock Therapy Synthetic Suspension Fluids are recommended for front forks and shocks on snowmobiles, motocross and cruiser motorcycles, ATVs and other racing and recreational use vehicles, as well as cars and trucks that require their suspension systems to perform in the most extreme conditions.

STM 10 Suspension Fluid. Products for Harley-Davidson Motorcycles. Buy Now. More Info.