HR-1 is perfect for big block muscle cars and blown street rods. Perfect for engines with original seals. Good for loose bearing clearances.

Designed Specifically For Hot Rods & Classic Vehicles

Well suited for a variety of hot rods, muscle cars and vintage vehicles. This oil is an excellent choice for big block muscle cars, blown street rods and engines with original seals. Features storage protection additives that guard against rust and corrosion during winter storage. Good for flat tappet, overhead and roller cam engines. No ZDDP or additives required. Viscosity typical of 15W-50. Formerly referred to as HR1.

ZDDP Anti-Wear Additives
Military Spec Storage Protection
Start-Up Protection Additives
Excellent Seal Compatibility

STORAGE PROTECTION - Uses the same oil additive technology developed for the U.S. Military for storing and shipping their combat equipment. Protects against rust and corrosion so your engine is protected even when it’s not running.

HIGH ZINC CONTENT - Higher levels of Zinc (ZDDP) than regular passenger car oils. Delivers proper anti-wear protection for older style push-rod and flat-tappet engines.

CAMSHAFT WEAR PROTECTION - Superior camshaft wear protection chemistry. The same wear protection found in Driven Racing Oil which has powered Joe Gibbs Racing to multiple NASCAR Championships.