> It's so simple things like truck drivers who prefer to keep their diesel running during loading/unloading Well, one reason is that it might not turn on again

> It's so simple things like truck drivers who prefer to keep their diesel running during loading/unloading Well, one reason is that it might not turn on again. A lot of mechanical faults happen at startup (or shutdown). In the US Air Force, C-5s are notorious for not turning back on again once you power them off. Hence, if you just landed in a remote area, you better keep those engines going, because if you power everything off to save energy you might be stranded until a repair crew can fly out.