K&N Oil Filters K&N produces a wide range of performance Oil Filters to suit cars, trucks, SUV’s and more! Providing high flow rates and outstanding filtration which is especially important for racing vehicles where heavier grade oil is used and the oil is pumped much faster than in a standard vehicle. K&N automotive oil filters are engineered to handle all grades of synthetic, conventional and blended motor oils. K&N Oil Filters are built to the same exacting standards as their world famous high-flow Air Filters.