You know what ? You bring up a very interesting topic. I had a KIA Optima EX for 7 years and it ran like a charm right up to the day I traded it in. I installed a catch can on that car on the advice of the user group and it did a great job. I would get about a tablespoon of crap out of it every time I had my oil changed. I was glad to trap that gunk rather than feed it back through the engine to burn. Anyway I was considering on installing the same on my new Canyon and now I have the info to purchase one that's tested and installed. Thanks for posting this question and those who responded. Trust me on this ..... this is a wise and worth wild investment.