Sure you can run Kero, but I wouldn't do it!! This was common practice in the OBS trucks and many did it when Kero was reasonable, but the 99+ PSD have totally different injectors, and at about $300 each , you first!!!! Typically the Kero is combined with reg #2, but as I said I would be doing this on a newer truck!! As for the farm, or offroad diesel, no problem at all!!! Just don't get caught on the road without farm tags. It is filtered exactly the same as #2, if you buy from a station, the problem is when you pump it out of a farm storage tank. Many of these are old and full of crud and most have no filters, I would want to see a five micron filter before it went in my tank. If you get caught it is 10K in fines. I have seen state troopers at the cattle auctions dipping tanks while folks are in the auction and they usually catch a few!!
NCH