Watch the Odo, not the speed

[blackbird]

Our two vehicles read about 1 MPH slow, one is a 2000 S10, the other a 1989 Corsica. But, the odometer in the car is slower than in the truck, therefore the gas mileage in the car is better than we think or you could say the truck gets slightly worse MPG than we think.

I know that the 91-96 Corsica/Beretta dash printing is off, below 45 mph it is 1.5 mph slow, and above 45 MPH the speed reads 3.5 mph too slow (gps verified), and the two Corsicas I've had in this year range had HIGH reading odometers, as my trip to work in one car was 30.3 miles, and the other was 29.6, where I think the actual milage is somewhere around 29

So we need to use GPS or map out a route to follow (preferably a long one, maybe 50 or more miles) to figure out how accurate, or how inacurate, your odometer is, so that you can adjust your figures so you can figure out your ACTUAL mpg.