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Oil Filter change interval is widely defined as a mileage, expressed in Kilometres/Miles of the Vehicle driven. On the other hand, for convenience, repeatability and differentiation reasons, the Filter life time is evaluated in the laboratory test bench according to standard test methods. The Life Time is expressed in grams of calibrated dust injected into the filter inlet so as to clog it. The most commonly used test standard is ISO 4548-12 [7]. So far, there is no widely known and recognized relation between the service time in kilometres and the dust holding capacity according to ISO standard. The purpose of the following study was to establish a relationship between ISO standard dust capacity and the ability of the filter to successfully achieve the service interval in 90% of cases. A large number of used filters were collected and analysed in order to conduct a statistical analysis. Impacts of fuel type, engine displacement and road conditions were identified.

Since many years now, environmental regulations got stricter and stricter, leading modern engines (both Gasoline and Diesel) to integrate more depollution devices, to fit new emissions limits. Moreover, the CO2 emissions regulations led also major powertrain improvements in various fields like friction reduction, weight saving, but also engine specific power implying often higher turbocharging rate, with higher temperatures and higher flow rates. As a direct consequence, modern engines have increased the core value of the exhaust line with more complexes and fragile after treatment devices, while working conditions have ran tougher. Therefore to guaranty long term reliability for exhaust line and even making it smaller and lighter is a new objective. This is confirmed by Environmental Regulations which now requires durability threshold for depollution devices.