Cam and Lifter Wear as Affected by Engine Oil ZDP Concentration and Type Fuels and Lubricants Dept., Research Labs, General Motors Corporation

Format:

Conference/Event

Author/Creator:

Pless, Loren G., author.

Conference Name:

1977 International Automotive Engineering Congress and Exposition (1977-02-28 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1977

Summary:

The recent increase in excessive camshaft and lifter wear after extended service has shown that some SE-quality engine oils do not provide adequate protection.To determine the effects of oil additives on wear, controlled tests were run using 1972-1974 model cars, unleaded gasoline, and either SE commercial products or experimental formulations. Field experience with 1970-1975 model trucks, leaded gasoline, and SE/CC or SE/CD oils was also investigated.With some commercial oils, in both controlled tests and field experience, excessive wear sometimes occurred after extended service, even with recommended oil-change intervals. Generally, protection from excessive wear was best provided by those oils containing pre-dominantly alkyl ZDP (zinc dithiophosphate) antiwear additive instead of aryl ZDP. These results show that a laboratory engine test is needed to evaluate the long-term wear protection of engine oils

Notes:

Vendor supplied data

Publisher Number:

770087

Access Restriction:

Restricted for use by site license