The Pennzoil brand has successfully achieved the first Lubricant Marketers approval for the next-generation General Motors (GM) dexos1:2015 specification.
The objectives of next generation dexos1:2015 are improved fuel economy, turbocharger deposit control, aeration, stochastic pre-ignition (SPI) control, oil oxidation and piston deposit control, as well as accommodating the new SAE J300 viscosity grades.
The company says many of these changes are due to the growing trend of smaller, more fuel efficient engines. Within the engines, the higher compression ratios, among other factors, have created a phenomenon commonly referred to as SPI or low-speed pre-ignition (LSPI).
The dexos1:2015 specification holds motor oils to the same stringent requirements as GM’s most advanced engine technology. New dexos1:2015 is backwards compatible with previous dexos1 requirements.
