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Performance Characteristics Of Low Volatility Vs. High Volatility ZDDP; An Alternative Argument for the Addition of a Phosphorous Volatility Test to GF-5. Dennis W. Florkowski Chris Engel. Low Volatility ZDDP.
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Performance Characteristics Of Low Volatility Vs. High Volatility ZDDP; An Alternative Argument for the Addition of a Phosphorous Volatility Test to GF-5 Dennis W. Florkowski Chris Engel
Low Volatility ZDDP • Phosphorous from engine oil reaches the exhaust system via leakage, oil consumption and volatility. • Lubricant development efforts are of particular importance in reducing phosphorous poisoning via the volatility pathway. • Specifically as ZDDP decomposes in an engine some volatile phosphorus species are known to exit the engine via the PCV system and eventually poison the exhaust catalyst. • Low Volatility ZDDP is formulated in such a way that the amount of volatile phosphorus species are significantly reduced. • OEM’s and their suppliers are interested in low volatility ZDDP’s to protect increasingly sophisticated exhaust systems. • Equally as significant, the use of low volatility ZDDP is expected to not only protect emission systems, but also to maintain excellent antiwear and antioxidant performance and provide a measurable increase in engine oil life.
Vegas Field Trial (5W-30) Three Oils Were Tested: • Baseline with 0.1% Phos • Prototype 0.075% Phos Conventional ZDDP • Prototype 0.075% Phos Low Volatility ZDDP
2.7L Field Trial Drain Data Low Impact ZDP ∆ Low Volatility ZDP Fe Conventional ZDP * Conventional ZDP Fe
2.7L Field Trial Drain Data 2.7L Field Trial Data ∆ Low Volatility ZDP Fe * Conventional ZDP Fe Conventional ZDP
Vegas Field Trial (5W-30)Drain Analysis @60,000miles Baseline Conventional Low Volatility In many catagories, the Low Volatility Phos material even outperforms the baseline oil (0.100 phos).
Conclusions • Based on 60,000 miles of drain oil analysis, four cars on each formulation, Low Volatility ZDDP out performs Conventional ZDDP in all categories measured. • Based on lubricant performance alone, a reduction in phosphorous volatility will significantly improve engine oil quality for GF-5. Can we develop a test to measure phosphorous volatility in an engine?