Maybe Imperial Gallons? Canada is now on the metric system so he might be converting to their old standard-Imperial gallons. Don Savard dardal@xxxxxxxxxxxxxxx wrote: > Quoting Matt Hopkins <mhoppy@xxxxxxxxxxx>: > > > 18 MPG, Tell us more. Is the engine just tuned really well or did you > > make > > modifications? Did the 73 use regular gas. I am thinking the 75 was > > first > > year for catalytic converter > > > > Also, how is the odometer calibration. I think the 73 had the lower 3.23 rear > gear, making the 18 mpg less likely. > > D^2, 2 68s, both gas guzzlers! >