I know there are plenty of people that "drive" there street cars with no filtration. But I hardly call a 5 mile drive going anywhere. 5 miles will not even get me to the nearest major (if you want to call it that) intersection, my trips start with 1.6 miles of a silty, very dusty dirt road. I have always laughed when people tell me there car is street driven and it has 14:1 compression, a spool with 5.17 gears, dual dominators and a VW Sirocco radiator. People throw "street driven" around way to much. Cruising to the local burger joint 3 miles away, while it is a public street, is hardly a drive. A 400 mile range, in itself at least to me, does not qualify it as a street car. At least not in my circumstances. Last time I washed my truck I crept up the dirt road, keeping my speed at 2-3 mph on my gps, and by the time I got to the pavement I had a layer of silt on my truck. There is no way in hell I would drive a car up here without an air filter....