To meet changing fuel economy and emissions standards, modern engine hardware has evolved and requires higher performing lubricants. Engine downsizing, turbocharging, gasoline direct injection (GDI or TGDI), variable valve timing, and the introduction of stop/start, hybrid and electric technologies mean GF-5 tests simply do not measure up to the demands placed on modern lubricants.
The automotive industry’s recent licensing of the supplemental lubricant category API SN PLUS to mitigate low-speed pre-ignition (LSPI) observed in vehicles equipped with GDI engines is a start, but there are still more issues that require a better lubricant solution. The new ILSAC GF-6 will balance these equally important needs:
- Fuel economy and fuel economy retention
- Emission system compatibility
- Engine oil robustness to protect engines from wear related to idle stop and failures related to LSPI and turbocharger depositing
This performance standard will include two separate specifications - GF-6A to represent the existing ILSAC viscosity grades and GF-6B will be defined for 0W-16 viscosity grade oils only.
For a deeper dive into specifications, see the Lubrizol Ready Reference Guide, the industry's go-to resource for understanding fuel and lubricant performance principles and requirements.