Ive heard its best to have a heater for the fuel tanks and even a temperature gauge to keep it around 130 degrees . It will prevent the WVO from becoming thick and or hardening and clogging up your injectors, etc. Also make sure you properly filter the WVO and take steps to remove any water. Im thinking of putting my flatbed on my f150 and maybee even the engine etc later on if thats even possible. If anyone knows please help with any input..