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OPERATING THE HDGT
MAIN MENU
>>
SPECIAL FEATURES
>>DRIVING COACH OPTIONS
Calibrate MPGs
This option will allow you to adjust the fuel efficiency calculation on
the HDGT so that it is as accurate as possible.
Checking Average Fuel Economy
It is important to check the average fuel economy on your vehicle
and on the HDGT at least once every changing season. There are
many reasons for this; here is one example:
The fuel delivered to gas stations during the winter contains an
average of 1.3% less energy than the fuel delivered in warmer
seasons. This means that the same amount of liquid is going into
the tank, but it is 1.3% less effective, on average.
There are many similar factors that affect fuel efficiency that
cannot be controlled; since it is not possible for the HDGT to sense
or adjust for all of the factors, it is important to be able to adjust
the fuel economy setting.
1. Fill the gas tank.
2. Clear/Reset Driving Stats.
3. Set the trip odometer to zero.
4. Drive the vehicle for an entire tank (or two).
5. Calculate the average fuel economy (MPGs).
6. Calculate the Percent Difference between the MPGs that you
have calculated and the MPGs displayed by the HDGT.
IMPORTANT NOTE:
If the speedometer on the vehicle is not accurate, then the odometer and
MPG gauge will also be incorrect.
MPGs
=
Miles Driven
Gallons used to fill the tank back up
Percent Difference = GT MPGs - Calculated MPGs
Calculated MPGs
