Patent ID: 8607991

Claim:
An internal combustion engine lubrication system adapted to produce low levels of lubricant additive combustion by-products, comprising: strong base particles held closely together by physical constraints or a binder without binding the strong base particles to a substrate, said strong base sequestering acids and/or neutralizing acids in said lubrication system, and said strong base particles having a surface area greater than or equal to 25 m 2 /gm that is derived from pores having a median pore diameter between 60 Angstroms and 3,000 Angstroms as measured by mercury intrusion porosimetry; and a lubricant having reduced levels of a combustion acid neutralizing detergent relative to a level of the combustion acid neutralizing detergent in an unused lubricant formulated to have a given sulfated ash, phosphorus, and sulfur (SAPS) level allowed for use in said internal combustion engine lubrication system without said strong base, wherein said strong base performs or supplements the sequestration of the acids and/or neutralization of the acids such that the strong base particles and lubricant together sequester and/or neutralize at least as much acid as said unused lubricant formulated to have said given SAPS level would sequester and/or neutralize alone.