Rock Oils GRO Gearbox Racing Oil, is a premium, largely synthetic lubricant designed for all racing and high performance automotive, motorcycle and marine transmission systems.
The thermally sensitive construction of GRO ensures optimum performance in all conditions and has extremely low drag characteristics, whilst retaining outstanding resistance to severe shock loadings that occur under race conditions.
GRO is suitable for all high performance transmission systems where S.A.E 10/40, 20/50, or 30 lubricant is recomended.
Grade SAE EP 75w/90 API - GL4