I am using the fleetguard unit and it has proven to be great. I had extended the hose that just moved the drip granted away from the radiator but in reality just moved it to someplace else. I put a new driveway in early last year and as I soon found out at the same time my vacuum pump seal took a dump. So I decided I was done with dripping oil of any type on my driveway so replaced the vacuum seal and installed the enviroguard at the same time. I have not had one drop of oil on my driveway since that day. Also my truck does not eat oil like it used too. Not that it was much maybe a pint or so every couple thousands miles but now have not had to add one bit of makeup oil since the installation. It was more expensive than I would have liked (my local cummins had some kind of sale going on and I saved like 20% but after tax etc it was still in the neighborhood of 2 bills). Never wanted to spring for it before. However now that I have it I wish i would have done it sooner, a lot sooner like 10 years ago. Though it is not needed and could be hard to justify the cost it is nice having no drip.