Here in Minnesota, diesel is required to be a 2% biodiesel blend. Biodiesel is supposed to provide excellent lubricity, so you could always add some if you're worried. Or, even better, use B100.

I don't think there is much to worry about using ULSD as-is, though.


1988 Isuzu Trooper LS
2.8l Isuzu 4JB1-TC intercooled turbo diesel
www.dieseltrooper.blogspot.com