PETROFLO SYNTHETIC MOTOR OIL is manufactured from 100% synthetic base stocks. The unique combination of high performance synthetic fluids and proprietary additive systems enables PETROFLO SYNTHETIC MOTOR OIL to offer advantages beyond their conventional SAE viscosity grade counterparts. Conventional mineral oils thicken or thin dramatically with changes in temperature. To compensate for this weakness, manufacturers add thickeners to conventional multi-grade oils to slow thinning as engine temperatures rise. PETROFLO SYNTHETIC MOTOR OIL is available in MULTI-VISCOSITY 0W-40, 0W-30, 5W-30, 10W-30, 15W-40, 15W-50 and has a naturally high resistance to changes in viscosity due to temperature and requires less of these thickeners. This results in a heavier, more stable protective oil film for engine bearings piston rings than provided by similar SAE viscosity grade mineral oils. It contains fewer impurities, so it protects better than conventional oils in cold weather. PETROFLO SYNTHETIC MOTOR OIL is fully compatible with mineral-based, conventional, and synthetic blend engine oils.