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International Lubricant Evaluation
 JASO* Engine Evaluation
Nissan TD25 Detergency Evaluation (JASO M336:1998)
 

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Southwest Research Institute (SwRI) offers the Nissan TD25 Detergency Test (JASO M336:1998), which evaluates the detergency of automobile diesel oils under high temperature and high load.


JASO Specifications

The Nissan TD25 detergency procedure is part of JASO Specifications:

  • JASO DH-1

  • JASO DL-1

Field Service Simulated

The JASO M336:1998 procedure simulates high-speed highway service in a diesel-powered passenger car or light truck.


Nissan TD25 Detergency Fixture

The fixture is an engine dynamometer test stand with a Nissan 2.5L four-cylinder, inline diesel engine installed.


JASO M336:1998 Parameters

The engine is run continuously for 200 hours with the exception of a complete oil change at 100 hours. Engine operating conditions are as follows:

 

Properties Limits
Engine speed, rpm 4,300
Engine torque, N-m Max
Engine oil temperature, C 120
Coolant temperature, C 90


Nissan Parts Evaluated

  • Pistons and rings are evaluated for lacquer deposits, wear, and ring sticking.

  • Oil rings are rated for clogging.

  • Cylinder liners are evaluated for deposits and wear.

  • Cylinder heads are rated for combustion chamber deposits.

  • Oil-contact surfaces in the engine are rated for sludge formation.

  • Many engine components are evaluated visually and dimensionally for wear.

Used Lubricant Analysis

The lubricant is evaluated for:

  • Kinematic viscosity

  • Soot conten

  • Sulphated ash

  • Total acid number

  • Total base number

  • Insolubles

  • Water

  • Fuel dilution

  • Wear metals

Pass / Fail Criteria

DD6 reference oils acceptance limits are:

  • 7.47 - 8.42 Average Piston Merit

  • 39.3 - 64.6% Top Groove Fill

Candidate oils must be equal to or better than the testing laboratory's DD6 reference procedure result.

 

For more information about Nissan TD25 detergency evaluation  (JASO M336:1998) capabilities at SwRI or how you can contract with SwRI, please contact Ryan Johnson at rjohnson@swri.org or (210) 522-2892.
 

*Japanese Automobile Standards Organization

 

Contact Information

Ryan Johnson

Nissan TD25 Detergency Evaluation  (JASO M336:1998)

(210) 522-2892

rjohnson@swri.org

Related Terminology

Nissan TD25
detergency

JASO M336:1998

engine oil
performance

automobile diesel oil
detergency

engine component
evaluation

viscosity increase

piston deposits

JASO specifications

Japanese Automobile
Standards
Organization

Related Information

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| 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.

September 30, 2008