HR-1 is a 15W50 engine oil by Joe Gibbs which is suitable for older style pushrod (OHV) engines and has been developed to provide increased protection for camshafts.

HR-1 also includes additives which protect against rust and corrosion even when the engine isnt running. This makes it ideal for classic cars which aren't used as daily drivers.

Ideal for cast iron V8 engines or older engines with looser tolerances.
5 Litre

Viscosity Grade 15W-50
KV100 (cSt) 19
KV40 (cSt) 147.5
Viscosity Index 140
Zinc (ppm) 1250
Pour Point (°C) -39
HTHS (cP) 4.74