From a press release issued by Harley-Davidson:

HARLEY-DAVIDSON ANNOUNCES NEW SYNTHETIC MOTORCYCLE LUBRICANT

Screamin’ Eagle SYN3 Designed for Engine, Transmission and Primary Chaincase Lubrication

MILWAUKEE, WIS. – (January 30, 2003) Harley-Davidson recently announced it has developed a new synthetic lubricant designed to meet the unique needs of Harley-Davidson and Buell engine, transmission and primary chaincase lubrication. Screamin’ Eagle Synthetic Motorcycle Lubricant (SYN3) can take the place of engine oil, transmission lubricant and primary chaincase oil, making SYN3 a multi-purpose synthetic lubricant in a category of its own.

Developed by Harley-Davidson engineers in conjunction with industry leaders in the lubricant business, SYN3 was created and extensively tested for maximum performance in Harley-Davidson and Buell engines, transmissions and primary chaincases. The versatile SAE 20W50 lubricant will be sold exclusively through Harley-Davidson and Buell dealerships starting in February (Part Number 99824-03/00QT, MSRP $8.25/quart bottle).

SYN3 is especially appealing to two groups of riders: Performance-minded riders whose motorcycles run hotter when pushed to the limit and those who ride in areas with warmer temperatures. Both types of riders know how crucial it is to ensure proper oil cooling to maintain performance and reliability.

More than three years of laboratory bench testing, dynamometer testing under accelerated conditions, open road and closed course durability testing, wear and deposit rating analysis and sophisticated used lubricant analysis went into producing the optimal combination of three synthetic basestocks and carefully chosen mixture of additives which offer superior lubrication and cooling, as well as protection against rust and oxidation. Screamin’ Eagle’s more than half a million miles and 500-plus hours of dyno testing proved that in addition to reduced oil consumption, SYN3 also provides high temperature film strength, which means the lubricant maintains film thickness in high power output and high engine speed conditions, keeping the metal parts from rubbing against each other and resulting in less wear.