While I was working on the Caravan my Dad noticed a plug in the engine. We found it's for an oil pan heater and until this year we didn't know it was even installed in the van and our neighbor who we bought the van from didn't know about it either. I used it today (29-May-2014) and it bumped the fWT up to 132ish once the van was started (Maybe this temperature goes higher when the plug is in longer?) and I heard fluids going through the engine unlike I ever had before. This made a significant difference on the MPGs down the road, Close to 13 miles to a grocery store. I was getting higher on average than I was used to on a cold start! So I'm going to be using this heater more often. I'm happy and thankful the van already had this installed before we even bought it.
Now the winter MPGs have gone up with the use of this nifty gadget!