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 racing conditions.
Gro is suitable for all high performance transmission systems where an
SAE 10W40, 20W50 or SAE 30 lubricant is recommended.
SAE EP 75W-90 API-GL4