Patent ID: 7520371

Claim:
An internal combustion engine lubrication system adapted to produce low levels of lubricant additive combustion by-products, comprising: filtration media including particles having internal pores formed within individual particles and interstitial pores formed between adjacent particles, the internal pores and the interstitial pores collectively defining filtration media pores, and a strong base material associated with at least some of the internal pores, wherein the filtration media pores have a surface area greater than or equal to 25 m 2 /gm that is derived from filtration media pores that are large enough to receive a combustion acid-dispersant weak base complex contained within oil flowing through the filtration media, the filtration media sequestering acids and/or neutralized acids as lubricant passes through the filtration media without adding to at least one of sulfated ash, phosphorus, and sulfur (SAPS) levels of the lubricant; and a lubricant having SAPS levels at least 10% below maximum SAPS levels allowed for an unused lubricant formulated for use in said internal combustion engine lubrication system without said filtration media.