here's a link to where it's discussed at Pavementsucks.com. . the general diesel public is so naive it ticks me off. . 'yeah listen to big brother'
http://www.pavementsucks.com/forums/viewtopic.php?topic=92644&start=0&9

http://www.pavementsucks.com/forums/viewtopic.php?topic=92644&start=0&9