I was down at the local Dodge dealer looking at the Ram 2500s with the TD. I really want to get one of the Ram 2500 4x4s before they screw them up with IFS but I'm torn about wanting a full 4 door. Anyway, I see this truck (I’m told 2001.5) that looks exactly like what I want and it has a sticker in the window saying it has the "Diesel Max" option ($4500!!!). So, the salesman tells me that this is a new option from Dodge where they put a Propane injection on it. The tank takes the space where the spare usually goes and it has a control switch on the dash to engage/disengage the Propane system. Salesman tells me this adds over 50% to the HP/Torque across the entire range along with a boost of 20% MPG while towing with no down side. Now, salesmen being what they are, I’m thinking, “yeah, right!”. If it’s that good, it would be everywhere! So, I say I want to see for myself. He gets the keys and out we go. Since there was a switch on the dash I can try it with and without easily. WOW!!! I started off with the switch off and it was pretty much the same as the 2000/2001 trucks but the diesel clatter seems to be less noticeable (maybe just me). Then, I slow down almost to a stop and throw the switch. Diesel clatter drops noticeably! When I hit the gas, this thing literally LEAPS forward! The difference was amazing, just by “seat of the pants” it felt like way more than any 50% increase. I can’t say about what it’s like under load but I drove this thing unloaded for about 15 minutes in a variety of “modes” and I gotta say, I loved it! Makes the stock Duramax and Powerstroke look like a small block. Now, I know that is not “apples to apples” with the Cummins Propane injection but it was pretty impressive. I’m sure the Gale Banks kits are even more impressive and less than half the cost but the “Diesel Max” comes with the full Dodge power-train warranty. Salesman also says it cuts emissions in a HUGE way and I did notice (when the salesman pointed it out) that when engaged there is almost no diesel smell in the exhaust. So, anyone know the real story? Salesman says that this has been used in the past and is nothing new. I’m sure there must be a down side or they would all be using this right? Sorry if this is a stupid question but I really know very little about diesels. Bad Dog 85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.