Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Maybe I Got a Knockoff
Review: Interesting most of the reviews say the performance(hp) of the engine improves and the mpg stays about the same. I would say my performance stayed about the same and my mpg went down a good 2-3 mpg. I am rather disappointed by this product in how it has mostly hurt the performance of my 2008 Civic. I suppose you can do worse, but like maybe those other products that are supposed to do great things for your car(like oil additives), just save the extra $40-50 and replace your air filter with any ok one every 50,000 and you will be allright. I can't recommend the K&N.
