I am talking about same filter company and the price varies a lot for various car. Filter for Corolla is a lot more expensive than filter for Passat. Since Corolla is a much more popular car on the road and is the best small compact seller, the "supply and demand" doesn't hold water here. The Passat filter is about 3 times bigger than the Corolla's filter and cost 1/3 less. The same is for Cherokee's filter. Why are Corolla's filter so ____ expensive.