For trips that short I would change oil extremely often as the engine isn't even warming up in a mile and a half... otherwise a mile and a half takes 20 to 30 minutes to walk! if it's in town it can be faster to bike then drive, but where you are it sounds like you have some highway or at least roads with faster speed limits.
I would opt for something electric, depending on your other needs, towing a trailer with a small electric vehicle shouldn't be an issue and with the small amount of driving you do even a lead acid battery pack could last 10+ years, you'll also get instant heat and you could wire it up to preheat so you leave for work getting in to a warm vehicle.
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