To Rolling Eudaimonia:
Sorry, you misunderstood: Visible smoke WILL increase , proved by many exhaust emmission tests. The average says clearly 10% to 15 % more particulates. That does not mean the smoke you see with your eyes on a average Deuce, this is from the test benches with a Hardtrige smoke meter.
I did not say, that oil consumtion will increase, I said the CHANGING intervall has to be reduced to half or one third of the usual due to contamination of the oil.
Modern trucks, and I mean those of EURO 5 or EPA7 or 8 or higher (ex. in the States the DD15 engine, first released in February this year), if converted to use bio diesel, have to cut their oil changing intervalls to the mentioned shorter intervalls. If you drive your Deuce only 5000 or 8000 miles a year, the annually oil change easily will cover that.
Fuel consumption will increase about 5% to 10% due to my experiance with a CUCV. Without fuel heating starting in winter is not very good, but will work down to about -10° Celsius, especially with classic diesels like the Deuce engine or those with a pre combustion chamber engine.
Wolf