Re: Diesel fuel additives
Yes. Stanadyne Perfomance Formula and Lubricity additive on every fill. Using up the rest of my Amsoil Cetane boost too, but that probably isn't necessary as I don't think the Jeep utilizes the higher cetane like my old BMW 335d did, (even with the GDE tune.)
The Performance Formula from Stanadyne contains both a slight cetane booster and lubricity additive, and the lubricity additive is inexpensive insurance since it's relatively cheap. In the US, our diesel quality is inconsistent, and when they took out the sulfur so too went the lubricity.
The only good thing about B5 is that it restores most of this lubricity lost when we went over to ULSD. (Stay away from those new placards disclaiming that their diesel may contain anywhere from B5 to B20, they ought to be outlawed.)
Lubricity is crucial for the HPFP, and Stanadyne also helps protect diesel injectors. Just to be safe, I probably add about 2oz's lubricity to 4oz Performance Formula. I prefer Stanadyne because they primarily make diesel injectors, and I remember using it on an old 1990 Jetta diesel in college 20 years ago, but there are others out there, too.
2015 Jeep Grand Cherokee Summit California Edition 4x4 EcoDiesel