Engine oil effects on vehicle fuel economy. Fuel efficient motor oil for japanese passenger cars.

Society of Automotive Engineers.
Hamaguchi, Hitoshi. Maeda, Yoshihiro. Maeda, Tsutomu.

1982

1013
CIENA

0-89883-115-6

A series of bench engine tests and field trials have been carried out using Japonese domestic engines and vehicles. Various motor oil viscosity grades were evaluated in order to select the best for fuel savings. A laboratory evaluation to assess friction behavior and antiwear properties was used to select suitable friction modifiers for formulating fuel saving motor oils. In general, higher oil consumption was obtained with lower viscosity oils. In some cases piston and bearing seizure occurred under severe operating conditions. Valve train wear performance of the lubricant appeared to depend mainly on the additive type used. From these experimental stydies, it was determined that a viscosity grade of 7.5W-30 was best for fuel efficiency, engine performance and durability in current Japanese vehicles. Fuel efficiency was further improved by incorporating an organic Molybdenum compound as a friction modifier in the formulation. ABSTRACT. TRENDS OF FUEL SAVING MOTOR OILS MARKETED IN APAN. ENGINES, VEHICLES AND MOTOR OILS TESTED. Test Procedures. SELECTION OF BEST VISCOSITY GRADE. EFFECTS OF MOTOR OIL VISCOSITY ON OIL CONSUMPTION. EFFECT OF MOTOR OIL VISCOSITY ON VALVE TRAIN WEAR. EFFECT OF VISCOSITY ON ENGINE FAILURE. FRICTION MODIFICATION. FUEL ECONOMY TEST ON MEDC-CONTAINING MOTOR IOILS. ANTI OXIDANT PROPERTY OF MEDC. LONG DRAIN PERFORMANCE AND COMPATIBILIT WITH CATALYTIC CONVERTER. SUMMARY. ACKNOLEDGEMENT. REFERENCES.

Presenta ilus. y gráfs.

GENERAL; LUBRICANTES; TRANSPORTE DE PASAJEROS; MOTORES; VEHICULOS JAPONESES; EFICIENCIA ENERGETICA; VEHICULOS AUTOMOTORES; USO RACIONAL DE LA ENERGIA; EFICIENCIA ENERGETICA; MOTORES DE COMBUSTION;