Compositional effects on the low temperature pumpability of engine oils
An in-depth study of the additive and basestock component factors affecting low temperature viscometrics and oil pumpability of multigrade engine oils has been made. Basestock pour points or residual wax contents alone do not predict low shear viscometric properties of the finished oils under slow cool conditions. Rather, the composition of the wax itself is a key factor with both normal and non-normal paraffins contributing to viscometric increases at low temperatures. It is shown that viscosity index improver and pour depressant selection can prove to be critical in the prevention of oil gelation leading to pumpability failure. The results of these lab viscometric studies have been confirmed in all weather chassis dynamometer tests on five 4-cylinder overhead cam engines.
- Research Organization:
- Esso Petroleum
- OSTI ID:
- 6425781
- Report Number(s):
- CONF-870204-
- Resource Relation:
- Conference: Society of Automotive Engineers international congress and expo, Detroit, MI, USA, 23 Feb 1987; Other Information: 870404
- Country of Publication:
- United States
- Language:
- English
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Refinery/additive technologies and low temperature pumpability
Low temperature pumpability of engine oils
Related Subjects
02 PETROLEUM
INTERNAL COMBUSTION ENGINES
LUBRICATING OILS
CHEMICAL COMPOSITION
HYDRAULIC CONDUCTIVITY
MEASURING METHODS
ALKANES
DYNAMOMETERS
GELATION
HYDRAULICS
PUMPING
SHEAR
TEMPERATURE EFFECTS
VISCOSIMETERS
VISCOSITY
ENGINES
FLUID MECHANICS
HEAT ENGINES
HYDROCARBONS
LUBRICANTS
MEASURING INSTRUMENTS
MECHANICS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
330100* - Internal Combustion Engines
023000 - Petroleum- Properties & Composition
020500 - Petroleum- Products & By-Products