OK so this may seem stupid but what fuel is everyone running on the new 2032R tractors. Manual specifies ultra low sulfur, which is typically on road fuel (green), but is anyone running off road (red) fuel? If so - how did you learn you could do this? Did your dealer say so? Will it void engine warranty - manual says improper fuel can void engine warranty. Just want to be sure I am doing the right thing. Again, I run heavy equipment for a living so red fuel has always kind of been a given for everything in the off road world, but with these new DPF filters I wasn't sure if it would change anything on this tractor. It doesn't on big equipment, but better safe than sorry. Thanks!