PIB TIP: CALCULATE YOUR MPG. Calculate your mpg by tracking your mileage between fill-ups and dividing the total by the number of gallon you burned. Do this for all trips. Weather, loads, routes, traffic, terrain, road surfaces and other factors affect fuel economy, which can be somewhat controlled if monitored. The Partners in Business program is produced by Overdrive and the consultants at ATBS, the nation’s largest owner-operator business services firm, and is sponsored by Schneider National Inc. and Freightliner Trucks.