Wagon Charging station

That's why we moved to Florida. To save wear and tear on our bodies.
As far as engine heat, I believe the "in heater hose" heater did the best. In central illinois once I bought new cars I no longer had cold starting problems. Modern ignition and fuel systems really are better than 6-volts and points.
Imagine the good ole days when they had to drain the radiators at night and cover the engine with a horse blanket.

When I first started driving big yeller diesel trucks they were left running 24/7 in cold weather and had glow plugs to start. Later we plugged them into an engine heater and they started just like a car gas engine.

 

Now that I like! Next time I'm driving my propane powered Buick whose carbon foot print was left stamped into the ground many a tree hugger ago..... I'm gona do that, park my propane powered land barge Buick in one of those spots that are appearing every where out here AND plug in my block heater!

.....guess I better go buy a block heater now

 

Hey, those block heaters do a bit for fuel economy too. I'm not sure how much, but the engine warm-up time is reduced.

 

Back when I worked for a living gas was so cheap few people worried about fuel economy.
The engine water heaters I used fit in the lower radiator return hose. Seemed to work the best of all engine heaters I tried.
The best engine preheater I've seen lately is "Florida."