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	A 23,000-gallon test tank and a Universal Data Acquisition and control system console developed and built by SwRI are used to examine lubricant-related issues in two- and four-stroke outboard engines.

Concern about energy conservation and environmental pollution has led to leaner oil-to-fuel ratios, which in turn, have affected lubricant requirements. Exhaust emissions reduction could contribute to a two-stroke cycle engine's viability in the future.

ASTM-TC and JACO Test Sequences

Southwest Research Institute (SwRI) engineers evaluate lubricants used in two-stroke cycle, air-cooled engines using the ASTM-TC and JASO test sequences. These sequences evaluate the lubricant's ability to:

• Resist combustion chamber deposit-induced pre-ignition

• Prevent ring sticking

• Inhibit deposit formation

• Reduce scuffing

• Resist spark plug fouling

SwRI conducts all engine and chemical tests required to evaluate lubricants for two-stroke, water-cooled engines, including the National Marine Manufacturers Association TC-W3™ specification tests.

International Standards Organization (ISO) Procedures

We also conduct recently adopted worldwide ISO test procedures to evaluate lubricants for:

• Exhaust smoke

• Exhaust system deposits

• Lubricity

• Piston cleanliness

For more information about our gasoline two-stroke cycle lubricant evaluation capabilities, or how you can contract with SwRI, please contact Tony Hendrix at ahendrix@swri.org or (210) 522-3720.

twostroke.swri.org 

| Fuels and Lubricants Technology Department | Fuels and Lubricants Research Division | SwRI Home |

Southwest Research Institute^® (SwRI^®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 11 technical divisions.

December 28, 2012