Starting your car’s engine on a cold morning is very tricky process, requiring a lot of very specific things to happen with millisecond timing and in a very specific order. Of course, the expectation from the driver’s seat is simple: you turn the key (or push the button),  your engine starts, and you go about your day — largely oblivious to the various processes and engineering that have just given you the miracle of cold-weather ignition. In the coldest parts of winter, many of us use a block or oil-pan heater to make life easier on our engines when starting in the cold. These devices add heat to the engine and the fluids circulating within it, making it more likely to turn over when its extremely cold. But what if you can’t plug your car in? What can you do to make sure that your engine starts — even if it’s been sitting in the airport parking complex for 10 days at 30 below? According to numerous experts, you’ll want to take at least two major precautions ahead of the winter cold to ensure maximum success. First, make absolutely sure your battery is healthy. Noting that even an aging battery may ‘feel’ just fine from the driver’s seat until it doesn’t, consider a battery test...