WOW, how warm does a F 250 6.7 block heater get?

It's minus 30 up here. I wasn't intending to drive today, so didn't plug in, but got an emergency call. Thankfully my Chevy fired right up....but in 30 below weather, everything.... suspension, shocks, tires, bearings, etc...were extremely cold and it took a long time for all components to warm up, which I do by driving slowly down side and back roads.

I sometimes wonder why I live where I do...and FoMoCo uses a northern town in my province for a cold weather, real life cold test base.

As Texas guy I have zero experience with what y'all are dealing with, but with what I have read on here about block heaters, I have to ask why do you have it plugged in if your not going to use the truck anytime soon? That and I ask since your concerned about the electric bill.

I am always interested in block heater talk, since my truck has one that will prob never get used so I have to live through others.

The installation instructions say it doesn't do any good after 3 hrs. the engine is warm enough in the coldest weather. It has no thermostat so leaving it on would be a waste.

LOL... Well when you need it you got it. I'm sure there are a lot of people in the big chill who wish they even had a block heater. I just took my pigtail out and used it for the first time in 2 years...got chilly here and mine is a CTD... Even with 2 batteries if you don't warm it up..it is a slug when it starts. That is even with 2 cycles of the intake warmer.

A more economical heater would be to use a small silicone rubber heater pad to keep the engine at a startable temperature. Get some black hi-temp RTV sealant and glue it to the side of the oil pan. I always glue mine to the side of the pan in case I have to use a weed burner or propane stove under the oil pan. They come in everything from 5W to 750W.

Amazon silicone heater pads

On my Ford diesel I have them on the oil pan, under the two batteries and the transmission pan. I only use the one on the engine oil pan for normal winter weather in Anchorage, but if I'm going up north and it's really cold, I'll use all of them.

Bill