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Cd · 01-09-2010, 02:59 PM

Well, I set my SuperMID to just under the 7826 number ( 7800 even to give it a little wiggle room by going over ).
I just took a 2 and a half mile trip down to the grocery store. At the time that I started the trip, there was still ice on the car and the battery was almost dead from sitting in the cold.
Despite not having enough time to warm up and sitting at two stop lights , ( and being an automatic) , the SuperMID said I got 36 MPG.

Any ideas why the readings could be off by so much ?

On the way back, I got " 46 MPG ".

That's just under what I got on my highway trip on a warmed up engine and no wind driving an average of 58 MPH. I verified that by filling the car and calculating that way.

So what could I be doing wrong ? Is it not possible to calibrate the SuperMID on a the data of a single 134 mile trip ?

01-09-2010, 02:59 PM	#5 (permalink)
Cd Ultimate Fail Join Date: Feb 2008 Location: Austin,Texas Posts: 3,585 Thanks: 2,872 Thanked 1,121 Times in 679 Posts	Well, I set my SuperMID to just under the 7826 number ( 7800 even to give it a little wiggle room by going over ). I just took a 2 and a half mile trip down to the grocery store. At the time that I started the trip, there was still ice on the car and the battery was almost dead from sitting in the cold. Despite not having enough time to warm up and sitting at two stop lights , ( and being an automatic) , the SuperMID said I got 36 MPG. Any ideas why the readings could be off by so much ? On the way back, I got " 46 MPG ". That's just under what I got on my highway trip on a warmed up engine and no wind driving an average of 58 MPH. I verified that by filling the car and calculating that way. So what could I be doing wrong ? Is it not possible to calibrate the SuperMID on a the data of a single 134 mile trip ?