公开(公告)号：US20200283691A1

公开(公告)日：2020-09-10

申请号：US16756502

申请日：2018-10-16

Applicant: SHELL OIL COMPANY

Inventor： Vivek Raja RAJ MOHAN ,  Edward Carl NELSON ,  Joseph Michael RUSSO ,  Anindya Kumar GHOSAL

IPC: C10L1/14 ,  C10L1/224 ,  C10L1/198 ,  C10L1/222 ,  C10L1/16

Abstract: Use of an unleaded gasoline fuel composition for reducing the occurrence of Low Speed Pre-Ignition (LSPI) in a spark-ignition internal combustion engine, wherein the unleaded gasoline fuel composition comprises a gasoline base fuel and detergent additive package, wherein the detergent additive package comprises a Mannich base detergent mixture, wherein the mixture comprises a first Mannich base detergent component derived from a di- or polyamine and a second Mannich base detergent component derived from a monoamine, wherein the weight ratio of the first Mannich base detergent to the second Mannich base detergent mixture ranges from about 1:6 to about 3:1, and wherein the spark-ignition internal combustion engine is lubricated with a lubricant composition comprising from 1200 ppmw to 3000 ppmw of calcium, based on the total lubricant composition.