1989-09-01

Base Oil Effects in Sequence IIID and Sequence V-D Engine Tests 892108

Base oil effects on oxidation, deposit formation, and wear in the ASTM Sequence IIID and Sequence V-D engine tests were studied. Key base oil variables were found to be base oil saturates, sulfur, nitrogen, and olefin content. No one single base oil variable adequately predicts the onset of Sequence IIID rapid viscosity increase although a linear combination of variables yielded good performance predictions. Sequence V-D deposits correlate modestly well with any of several parameters, but a four variable linear equation produces an excellent prediction model. Base oil composition was found to have no effect on valve train wear in either Sequence IIID or Sequence V-D with the additive packages used.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X