I didn't start paying close attention to my mileage until the end of June this year. Of course hot summer months = nice mpgs. Now that it's cooling off here in upstate NY I am noticing quite a significant drop in my mpgs. Now I know of course this is inevitable with the colder temps, but it seems like I am losing about 1mpg per 10degree temp drop. Is there a general rule of thumb for ambient air temps and how it effects mileage? Just curious... can't wait for winter!
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