Even better, you can preheat your engine using heat lamps; or in the extreme cold areas, a thermal wrap that contains heating elements.

Using a heat lamp assumes you have a garage, or you might find that animals try to get warm using your lamp and may end up in your engine compartment.

Some large equipment even contain electric oil pumps with heating elements that can heat the engine and lubricate it as well. I have seen people modify their trucks to have this as well.