This is the first oil sample on this car. It just completed the 2013 Peking to Paris Motor Endurance Rally. http://www.endurorally.com/pages/5th-peking-to-paris-rally-2013 Last oil change was in Saratov, Russia, and then 3,200 miles to Paris, hard driving, much in off-road dusty conditions. Industrial style air filter inside the cab. Only original mesh style oil filter.