Effect of sulfur on heavy duty diesel engine lubricants

Conference · Sun Dec 01 04:00:00 EST 1996

OSTI ID:403495

Hayden, T E ^[1]

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1. Texaco Fuels and Lubricants Research Dept., Beacon, NY (United States)

Diesel engine exhaust legislation has become quite onerous for heavy duty engines. Yet, these high thermal efficiency engines continue to meet lower exhaust particulate and NOx emissions limits, due to new engine designs and the complementary engine oil performance requirements of the API service categories. In addition, the EPA has mandated changes in on-highway diesel fuel to help meet particulate emissions regulations. On October 1, 1993, when the EPA outlawed high sulfur fuels for on-highway use, the development of the API CG-4 engine oil performance specification was already in progress. All the new diesel engine tests in the category were therefore designed to run with low (< 0.05% wt.) sulfur fuel. In some engine tests, this new fuel improved some lubricant performance characteristics and degraded others. An engine oil specification for low sulfur fuel brings new challenges to developing future specifications for diesel engine oils. Both higher and lower lubricant additive treat rate products, high performance single grade oils, and formulations to meet world-wide specifications become viable. This paper discusses the results of a diesel engine oil technology that performs well with the new, low sulfur fuel in both engine tests and in the field.

• OSTI ID: 403495
• Report Number(s): CONF-960356--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
33 ADVANCED PROPULSION SYSTEMS
COMPILED DATA
DIESEL ENGINES
DIESEL FUELS
FOULING
LUBRICATING OILS
PERFORMANCE
POLLUTION REGULATIONS
SULFUR CONTENT