SCREAMIN' EAGLE HEAVY SYNTHETIC GEAR OIL

Heavy Synthetic Gear & Primary Oil – SAE 80W-140

Tested and certified for Harley-Davidson transmission and primary chaincase applications, this Heavy Synthetic Gear & Primary Oil is engineered specifically for Harley-Davidson motorcycles. Designed to handle extreme temperatures, frequent two-up riding, and heavy load conditions, it provides reliable protection and performance in every ride.

Formulated with proprietary additives and pure synthetic base stock, this dual-viscosity oil flows easily at cold start-up and behaves like a 140-weight oil at high temperatures, offering maximum protection for gears and primary chain drives. It maintains the proper coefficient of friction for clutch operation and delivers superior lubrication across a wider temperature range than mineral-based oils.

Features & Benefits

• Tested and certified for Harley-Davidson transmission and primary chaincase use.

• Dual-viscosity SAE 80W-140 provides smooth cold start flow and high-temperature protection.

• Proprietary additives and synthetic base stock reduce wear and extend component life.

• Maintains correct clutch friction and ensures optimal primary chain drive lubrication.

• Designed for extreme temperature, heavy load, and two-up riding conditions.

• Not for use in the crankcase as motor oil.

This gear oil is approved by Harley-Davidson for all stages of transmission and primary chaincase life.