The API SQ specification introduces substantially more stringent testing requirements for high-temperature deposit formation, specifically targeting the extreme conditions experienced in modern turbocharged engines that routinely operate above 150°C in critical areas.
The modified TEOST (Thermo-oxidation Engine Oil Simulation Test) incorporated in the SQ specification measures an oil’s ability to resist forming harmful deposits on turbocharger bearings and other high-temperature components. Oils meeting this standard demonstrate exceptional thermal stability even after extended operation at elevated temperatures.
Valorem Chemicals helps Australian lubricant manufacturers understand and address these demanding requirements through technical support and carefully selected additive packages that deliver excellent high-temperature performance without compromising other critical performance parameters.