Quote:
Originally Posted by tweiss3
I always start my car, let it run for 15 minutes till its warm before beginning my trip. Also, its always about a 30 minute drive, close to 25 miles each way. If that helps determine my driving habit.
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That would explain the lower than average MPGs. In terms of your run time, for each of your average trips, your car is running for a total of 45 minutes or so, with 15 minutes or so spent idling. Idle = 0 MPG, and if ~33% of your run time is spent at idle, it's easy to see how this would effect your average MPG. Skip the warm up time idling - just drive off but don't beat on it until it's up to operating temp.