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 agains rusht 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.
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