I always try to put it in before the diesel. I am guessing that you generator has a return line? If it does it will mix the PS for you. Just run it for a while. That is what I had to do the last time. The truck delivered the diesel when I was not expecting it. /forums/images/graemlins/crazy.gif
JD 8320 MFWD, JD 6415 MFWD, FEL, and cab, John Deere MFWD 4600, John Deere 4020, John Deere 4430, John Deere 455 mower, Deutz, and Gehl 4610 perkins skidsteer
You'll be fine. I've never added it before. We always add it after they've filled the tanks.