Base Oils

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Group II / II+ Base Oils: Performance
Quite simply, Chevron Lummus Global's ISODEWAXING® technology builds better neutral base oils. Instead of using solvents to remove the wax, the ISODEWAXING® catalyst reshapes the wax molecules and converts them into high-quality base oil. (Learn more about Isodewaxing.) Group II neutral oils have several important performance advantages over solvent extracted/solvent dewaxed base oils (Group I):


 Oxidation Stability:
When subjected to the Turbine Oil Stability Test (TOST), industrial oils blended with Chevron base oils extend oxidation stability by as much as 14,000 hours (1.6 years) over comparable oils compounded with solvent-refined base oils. This makes Chevron base oils ideal for high-heat applications, such as turbine, paper machine, compressor, drive-line fluid and crankcase oils.

Soot Dispersancy:
Soot in diesel engines causes oil thickening and wear to critical engine parts. Chevron base oils improve soot dispersancy by reducing additive breakdown in the lubricant.

Cold-flow Performance:
Low temperatures can rob a lubricant of its ability to reach critical parts. Chevron Neutral Oils have superior cold-flow performance, producing lower Brookfield viscosities for drive-line and industrial applications.

Better Performance After 3000 Miles:
Future engine oil specifications will require that the oils maintain acceptable low-temperature pumpability after 3000 miles. The superior oxidation stability of Group II oils allows them to pass while Group I oils fail.

Longer Filter Life:
Better soot dispersancy with Group II oils also means longer filter life.