Running 100% Bio now. This has been a Colder than normal summer, with temps into the 50's at night. Anyway, first thing in the morning have to heat up the plugs, then takes a little more cranking than normal to start. Once its starts, it lopes for a few seconds before it settles in. Usually have an exhaust cloud.
once it warms up outside, it I go to start it there are no problems. Might have to add a few gallons of regular diesel until it gets more seasonal...