Reason why I brought the thread back from the dead was because I saw on another forum a CRV owner was trying to get the best mpg he could. He added a DIY catch can using an air compressor air/moisture separator. I had a buddy do the same on his SCed new model mustang and he says it definitely helps.
Cheap mod but if it helps keep a clean engine by cleaning the air recirculated back into the intake and potentially help gas mileage...why not. To each there own. Hope some tacoma owners with catch cans can chime in.