Been trying to find a replacement for the car quest filter. Couldn't find a good replacement. What's the importance of keeping it around? I get it's job, but it's not a engine saving piece and I can do just fine without it eh? Not sure how common it is to have water in the system or is a region type deal like block heaters. I know it "rains so much" in Seattle but I would imagine if that was the case then I have other issues letting water in the system.