I have been looking at the AMSOIL web site and I was wondering if any of you have installed one of their bypass filters. Also which filtration kits did you install. Looking at the site the BMK-21 AND BMK-22 look like they might be applicable to my truck. Also does those kits come with all the hardware to install them, do I have to drill any holes, order any extra parts. Once you guys have installed them how often do you change the oil. Would it be worth it to go back to using Royal Purple Oil again. The filter that I am looking into ordering with it is the EaBP-110. Any thoughts or suggestions on this would be helpful.