Antiwear Performance of Low Phosphorus Engine Oils on Tappet Inserts in Motored Sliding Valvetrain Test 2003-01-3119
The overall purpose of this research is to determine the antiwear capability of low phosphorus engine oils containing 0.05 wt% phosphorus. The antiwear performance of 0.05 wt% phosphorus engine oils was evaluated using a laboratory valvetrain bench test rig coupled with an on-line wear measurement technique and a high frequency reciprocating rig (HFRR). Low phosphorus engine oils were compared with GF-3 engine oils containing 0.1 wt% phosphorus. In addition to fresh oils, long drain used oils from fleet vehicles were also analyzed and investigated. This information is important to develop engine oil formulations to meet the latest government emission and fuel economy requirements. The results indicate that by appropriately selecting and balancing supplemental antiwear and/or antioxidation additives the wear loss due to the reduction of zinc dialkyldithiophosphate (ZDDP) may be compensated or even reduced.
Citation: Gao, H., McQueen, J., Black, E., Bjornen, K. et al., "Antiwear Performance of Low Phosphorus Engine Oils on Tappet Inserts in Motored Sliding Valvetrain Test," SAE Technical Paper 2003-01-3119, 2003, https://doi.org/10.4271/2003-01-3119. Download Citation
Hong Gao, J. Scott McQueen, E. Dewayne Black, Kay K. Bjornen, Arup K. Gangopadhyay, Ronald K. Jensen, Edward A. Soltis
ConocoPhillips, Ford Motor Company
SAE Powertrain & Fluid Systems Conference & Exhibition
Lubricants, Rheology and Tribology, and Driveline Fluids-SP-1810