STARFIRE Full Synthetic SAE 50W HD Manual Transmission Oil – 5 Gallon Pail | Heavy Duty Gear Oil for Manual Transmissions – Long Drain, High Temp, Oxidation Resistant

ENGINEERED FOR EXTREME TEMPERATURES – Built for high-heat, high-load environments, this SAE 50W synthetic oil resists thermal breakdown, making it ideal for long hauls, towing, and demanding fleet operations.

FULL SYNTHETIC FOR MAXIMUM EFFICIENCY – Advanced synthetic formula reduces internal friction, supports smoother shifting, and helps improve fuel economy and supports smoother shifting in heavy-duty manual transmissions.

LONG DRAIN INTERVAL PERFORMANCE – Designed to extend service life, this transmission oil offers excellent oxidation resistance and thermal stability for fewer oil changes and lower maintenance costs.

ADVANCED WEAR & FOAM CONTROL – Anti-wear and anti-foam additives protect critical components, ensuring consistent lubrication and long-term durability under severe operating conditions.

MEETS API MT-1 & OEM SPECS – Formulated to meet or exceed API MT-1 and other OEM performance standards—trusted by fleet managers, mechanics, and operators in both on-highway and off-highway equipment.