HS - liquid viscosity index improver is an oil solvent liquid viscosity index improver that minimizes the oil viscosity change rate with temperature.
It provides good viscosity-temperature co-relation. Provides maximum thichkening at a high operating temperature and minimizes thickening at low temperatures. This prevents metallic contact during operation. However, at low temperature, the oil retains its fluidity.
Recommended dosage :
4 - 13% in group 1 base oil
8 - 12% recycled base oil