Welcome to the Oil Filter Service, Inc Web site. Oil Filter Service has been servicing the filtration needs in the San Diego area since 1945. Back then we made due with three filter lines. Today that number has increased ten-fold. We are experts in locating or cross-referencing that hard to find filter. At Oil Filter Service we are not beholden to any filter manufacturer. This allows us to shop a filter to several different factories to provide you with a product that meets your need for quality at a competitive price.