Brand Ranks tests four popular oil filters (Fram, Mobil 1, K&N, Walmart) to determine their restrictiveness and filtering efficiency. [More...] Read More
Project Farm tests Fram Extra Guard, K&N Performance, Purolator, Wix, AC Delco, and EP Auto automotive air filters. [More...] Read More
Performance air filters claim to increase horsepower and improve acceleration, but do they actually work better? [More...] Read More