nothing but trouble here with BioD even @ 5% our problems began with we got an animal fat version of bioD and the next run a veggie BioD the two did not like each other. played hell on the filters on the pump and buses...Had to have a 2K tank pumped and cleaned. we go 5% biod every other tank full problems have lessened. but I won't run it in the skid or back hoe in the winter time since they sit out side from time to time..
replace filters on 26 transit buses.