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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.

Noise is one of the key nuisances from which the car is the source. One of those noise sources, the air induction line of the Internal Combustion Engine (ICE), can use some noise attenuation systems as damping isolated volumes (called resonators), or porous ducts, before the air filter. Those solutions can attenuate designated frequencies or range of frequencies. The issue is that those solutions can be bulky, especially for resonators, expensive or even generate some drawbacks on performances. Elements like hot air ingestion, pressure drops or even generation of new noises are some significant areas where performances can be deteriorated through the implementation of such acoustic device on the air induction line. It has then invented and developed a brand new type of acoustic device, designed to ensure optimal performances for a very low packaging. This solution preserves performances and cost, and tend to cope with most of the drawbacks of usual technologies.