Hey guys, my contractor allows me to take home my work truck which runs on diesel. I plugged it in last month because here in Iowa it gotten pretty cold. Not unusual, however I've noticed a significant increase in my electric use. Which typically doesn't occur since I've looked at previous years of records for October-November. Perhaps because as soon as I get home, I plug in the block heater. I don't typically get in my truck till about 5:30 in the morning next day. Looking at purchasing a outdoor plug timer. Do I need a specific type of plug timer since the diesel block heater could be pulling in more power? I believe I don't need to have my block heater on until 3-4 hours before starting the truck. Is that correct? Would appreciate the replies, thanks.