So winter is here in Kansas City and as I was letting the truck warm up this morning fully choked, fouling, sputtering and stinking up the joint it occurred to me that I could use a heater on a timer to pre-warm the engine this winter. So far I have seen magnetic ones which I assume could be stuck to the oil pan or directly to the block, and inline heaters spliced into the radiator hose. I was thinking I could get two of the inliners and splice them into the lower hoses on my truck, but wasn't sure about the ability to circulate heat past the water pumps. Splicing into the uppers is an obvious problem since the thermostats would be closed and I would be going the long way through the radiator. The magnetic piece seems like a good idea, but I don't know where I could put it other than the oil pan and I'm really looking for heated water instead of oil, and there doesn't seem to be much to conduct heat from the oil up to the block. Just air and the sides of the pan. The dipstick seems to be a joke. I have one for some reason and this weekend I plugged it in for the night. Next morning when pulled out the smoking stick with a ring of crud cooked at the top of the oil level... I reached under the truck to feel an ice cold oil pan. Has anyone here used either the magnetic or inline and what is your opinion?