Introducing GF-6 Lubricant Specifications
What’s New
GF-6 will provide LSPI and timing chain wear protection while improving piston cleanliness and fuel economy. GF-6 will introduce lower viscosity grades, similar to past new categories. In particular, SAE 0W-16 will have its own specification and will help increase efficiency and fuel economy in modern engines, helping OEMs to meet more stringent emissions regulations. Check out the chart below for a more detailed breakdown of how GF-6 performance demands will evolve from the GF-5 specification.
GF-6 Testing Summary
Sequence testing required for GF-6 specifications are featured in the table below. Six new engines tests were developed for GF-6—an unprecedented number.
| Sequence IIIH | Oxidation and Deposit Control |
| Sequence IVB | Valvetrain Wear |
| Sequence VH | Sludge and Deposit Control |
| Sequence VIE | Fuel Economy |
| Sequence VIF | Fuel Economy (SAE 0W-16 oils) |
| Sequence IX | Low Speed Pre-Ignition |
| Sequence X | Timing Chain Wear |
The Sequence VIII, bearing wear and shear stability, is the only engine test that will carry over from the GF-5 category into GF-6. The new tests will dictate component additive selection and require a new fundamental formulation understanding to meet the requirements. That’s where Afton comes in.