Engine oil is produced by mixing base oil with various additives. SUSTINA W BASE base oil has an ultra-high viscosity index (229 in 0W-20), which means there is less viscosity change with temperature.

Oil acts as a lubricant & coolant to major engine components, a sealant between the piston liner and the piston ring, and detergent to suspend the soot and grime inside the engine.

The fuel efficiency test for SUSTINA was tested under controlled temperature and humidity with the chassis dynamometer.