Can you tell me about this, what dose it do Thanks

There's lots of good info at www.oilguard.com (http://www.oilguard.com) . They go into fairly good detail to answer your exact question at: http://www.oilguard.com/side_menu/bypass_filtration/bypass_intro.phphttp://www.dieselplace.com/forum/smileys/Approve.gif

Clean oil, Amsoil has a setup and I believe Kennedy is working on a setup from Harvard. Preliminary results show that Kennedy's oil is cleaner then most respected fuel samples with the Harvard.