Using a heating element in a steel 45 gallon drum. Before I used the heat exchanger I still could get away with %60 veg %40 diesel in the summer, then using the exchanger I'd use 50/50 in winter & 90/10 in the summer. Alot depends on the pump, newer pumps are too efficient.
http://www.vegetableoildiesel.co.uk/forum/index.php
i got a s reg nissan d22 but i don't know what pump is on it.