ILSAC GF-6 will be split into two subcategories: GF-6A and GF-6B. The principal difference between the two subcategories of oils concerns viscosity grade and high temperature, high shear (HTHS) performance.

The proposed ILSAC GF-6A specification would replace the current ILSAC GF-5 specification, represented by the starburst/certification trademark, and would provide a new performance level of an engine oil for spark-ignited internal combustion engines.

The proposed ILSAC GF-6B will provide the same performance as GF-6A, but with the added aim of lower HTHS to deliver potential further fuel economy benefits. ILSAC GF-6B will be defined for 0W-16 viscosity grade oils only.

GF-6A - The attributes of GF-6A include the following:

Backwards compatible with older engines
Better durability to mitigate LSPI
Good fuel economy, as measured by Sequence VIE
Covers SAE 0W-20, 5W-20, 0W-30, 5W-30 and 10W-30 viscosity grades
For XW-20, min HTHS = 2.6; for XW-30, min HTHS = 2.9

GF-6B - The attributes of GF-6B include the following:

Not backwards compatible with older engines
Better durability to mitigate LSPI
Better fuel economy, as measured by Sequence VIF
Covers only SAE 0W-16 viscosity grade with min HTHS = 2.3

For more information on ILSAC GF-6, contact your Lubrizol representative.

ILSAC GF-6A and GF-6B