Title: Good filter, very bad filter oil
Product review: I put this in my 1997 Jaguar Vanden Plas. There was a noticeable improvement in gas millage. After 6 months, I washed the filter, let it dry then misted it lightly with K&N filter oil per the instruction. 2 days later the cold air sensor, thru put sensor, and retard return circuit fault all reported errors. I disassembled the whole intake line for cleaning up but still could not clear the cold air sensor and retard return circuit errors. I ended up brought the car to dealer for service that cost me $880. I still have it in my car. I washed it again and misted it with very very light oil. If you want to put this in your car, be careful, K&N filter oil has been reported to cause trouble with intake sensors in many modern cars. I just bought 2 filters for my Jaguar Super V8 and Mercedes E350. I washed them out of the box and applied a very very light mist of oil. So far so good.
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