I honestly don't know, I've never used it, I managed the maintenance an Ambulance fleet of Ford/Navistar POWERSTROKES & GM DURAMAX rigs, I had trucks with over 700,000 miles when I retired in 2013. I wasn't allowed to use additives, but I was dealing with different high pressure pumps and fuel systems. I currently use 1 ounce of HOTSHOTS EDT, 1ounce of STA-BIL diesel fuel treatment every fill-up and 2 ounces of HOTSHOTS LX-4 every 2ND -4TH fill-up, the LX4 is included in the EDT but I spice it up a bit on those fill-ups indicated. The STA-BIL seems to help with fuel consumtion to some degree, I typically average 22-24mpg depending on how I drive it. I have gotten 29mpg a time or 2, the sweet spot seems to be around 64-67 mph, your rig may differ depending on what gears it has, mine has 3.92. If you live in an area that doesn't emissions test I would also recommend tuning it, either stage one or stage two, it will solve a few problems that come with the ECO in stock emissions form. Tunes that shut down the EGR are getting hard to come by and you may have to order it from Canada to do it. Geno's garage.com has a locking fuel cap available too. A word of caution on fuel filters, I very strongly advise you to use OEM MOPAR fuel filters, other brands have proven to cause problems, they swell up and come apart. The OEM seems to do better with fuel/water separating. I order oil filters from IDPARTS.COM, I use the UFI brand, they look identical to the MOPAR oil filter and they say it is the OEM filter, it just doesn't say MOPAR on it. The recommended oil(SHELL ROTELLA T6 5W40)is in very short supply, just about any full synthetic oil that meets the CK4 spec should be fine, my last 2 purchases wer VALVOLINE BLUE EXTREME FULL SYNTHETIC 5W40.