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Tuesday, January 14, 2014

Synthetic Two-Stroke TC-W3 (Ashless) Oil

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JASO FC/ API  TC Quality Synthetic 2T Oil
Ingredients
%
Function
Infineum S911
2.5 to 4.1
Antiwear and detergency control
Solvent
25
Oil and fuel miscibility, low temperature flowability
Polyisobutylene (PIB)
25
Reduced smoke and lubricity
Ester Base Stock
46 to 47.5
Lubrication and delivery of additive to metal surfaces




Formulation Guide by ExxonMobil

Recommended ester basestocks from ExxonMobil are:
ESTEREX NP451 Thermally and oxidative stability and biodegradable (readily)
ESTEREX NP343 Thermally and oxidative stability and biodegradable (inherently)

Additive Requirement:

Combination of detergent, dispersant, lubricity, and flow improver components and may also contain rust and corrosion inhibitors and fuel stabilizers, depending on the type of oil.

See Other Synthetic Fluids Formulations:


Uses of Two-Stroke Oil:
  • Outboard engines
  • Motor scooters
  • Snowmobiles
  • Chainsaws
  • String trimmers
  • Snow blowers

Two types of two-stroke oils based on different additive chemistries:
  1. Low Ash:  Used in motor scooters, lawn and garden equipment, some snowmobiles and personal watercraft
  2. Ashless:  Used in NMMA TC-W3 outboard engine oil, and some snowmobiles and personal watercraft.

Why used synthetic?
  • Reduced smoke
  • Reduced carbon buidup
  • Cooler-running engines (less friction)
  • Easier start-ups
  • Leaner burn ratios (increased poer output for the engine)
  • Low temperature properties (great match for snowmobiles and snow blowers)
  • Readily biodegradable (ESTEREX NP451)
Legend:

API – American Petroleum Institute

API TC - This classification defines two-cycle engine oils for air-cooled, high-performance engines typically between 200 and 500 cc.

NMMA TC-W3 - The TC-W3® standard is a performance-based qualification program. The requirements include various bench tests for fluidity, miscibility, rust, compatibility, etc., as well as engine tests to evaluate the prevention of ring sticking and carbon buildup on pistons and other engine parts. The engine tests include one Johnson 40 hp, one Johnson 70 hp, and two consecutive Mercury 15 hp tests, all of which are run under severe conditions for 100 hours each. Two additional engine tests are also conducted to ensure a high level of lubricity performance. The testing process is comprehensive and expensive, but worth the outcome for consumers and manufacturers. - National Marine Manufacturer Association

Japanese Engine Oil Standard (JASO) 2T SPECIFICATION
Japanese motorcycle manufacturers found the limits demanded by the API TC specifications too loose. Japanese testing methods were much more severe and wider in scope than the API's TA, TB, TC rating format. Oils meeting the API TC standard still produced excessive smoke and could not prevent exhaust blocking.

JASO FA - Original spec established regulating lubricity, detergency, initial torque, exhaust smoke and exhaust system blocking.
JASO FB - Increased lubricity, detergency, exhaust smoke and exhaust system blocking requirements over FA.
JASO FC - Lubricity and initial torque requirements same as FB, however far higher detergency, exhaust smoke and exhaust system blocking requirements over FB.
JASO FD - Same as FC with far higher detergency requirement.

See Mineral Oil Lubricant Formulations

Flushing Oil
Chain Lubricant (Food Processing)
Rust Inhibitor-Lubricant-Penetrant
Grinding and Light Machining Soluble Oil
Soluble Oil
Penetrating Oil
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