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Phosphorus Volatility in GF4 Engine Tests Presentation for ASTM ESCIT May 4, 2006

Phosphorus Volatility in GF4 Engine Tests Presentation for ASTM ESCIT May 4, 2006. Absolute P Levels. Absolute Ca Levels. Loss of Baseoil Volatiles. Phosphorus, Adjusted for Baseoil Loss. Bulk Oil Temperatures. Phosphorus Volatility Summary and Recommendations.

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Phosphorus Volatility in GF4 Engine Tests Presentation for ASTM ESCIT May 4, 2006

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  1. Phosphorus Volatility inGF4 Engine Tests Presentation for ASTM ESCITMay 4, 2006

  2. Absolute P Levels

  3. Absolute Ca Levels

  4. Loss of Baseoil Volatiles

  5. Phosphorus, Adjusted for Baseoil Loss

  6. Bulk Oil Temperatures

  7. Phosphorus VolatilitySummary and Recommendations • Can be determined using conventional UOA • Sequence VIB appears to show “reasonable” scale • Possibilities for “multitasking” of a GF5 engine test to also yield measures of P volatility should be investigated • Analogous to IIIGA and T10A • Not as an extra P/F criterion • Goal is efficient utilization of data

  8. Another Important Point • There are substantial differences among ZDDP additives, both for P volatility and for antiwear performances • Recent OEM data compare a “Conventional” ZDDP versus a “Low Impact” ZDDP • Meaning of these terms are unclear • May be relevant to a single additive supplier

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