Instruct: Classify Amazon reviews into positive or negative sentiment
Query: How do you rate an oil filter.

If you have the sophisticated test equipment to measure flow, pressure and microns of dirt, you can rate oil filters. I think this oil filter is pretty good, but how do I know for sure? I bring this oil filter to the shop where I get my oil changed and I get a credit for not using their (assumed, cheap and crappy) oil filter. I gotta go with the old adage, you get what you pay for. My cars seem to last pretty long, and I use very good oil and this filter. As my math teacher used to say Q.E.D.