公开(公告)号：US20200024538A1

公开(公告)日：2020-01-23

申请号：US16519039

申请日：2019-07-23

Applicant: ExxonMobil Research and Engineering Company

Inventor： Douglas E. Deckman ,  Smruti A. Dance ,  Mark P. Hagemeister ,  Luca Salvi ,  Nicole Wallace

IPC: C10M105/68 ,  C10M105/38 ,  C10M105/06

Abstract: A method for improving oxidative stability of a lubricating oil in a diesel engine, in which biodiesel fuel is used with diesel fuel in the diesel engine, by using as the lubricating oil a formulated oil. The formulated oil has a composition including at least one Group V lubricating oil base stock. The at least one Group V lubricating oil base stock is present in an amount from 1 to 75 weight percent, based on the total weight of the lubricating oil. Oxidative stability is improved in a diesel engine lubricated with the lubricating oil, as compared to oxidative stability achieved in a diesel engine lubricated with a lubricating oil not having the at least one Group V lubricating oil base stock, as determined by a CEC L-109-16 Bio-Diesel Oxidation Bench test. The lubricating oils are useful as passenger vehicle engine oil (PVEO) products or commercial vehicle engine oil (CVEO) products.