1978 GMC C15 MPG

Based on data from 3 vehicles, 56 fuel-ups and 5,549 miles of driving, the 1978 GMC C15 gets a combined Avg MPG of 9.47 with a 0.93 MPG margin of error.

Below you can see a distribution of the fuel-ups with 2 outliers (3.45%) removed.

Following shows the average MPG of each of the 3 vehicles in the system.

• Power Wagon

  1978 GMC C15 Heavy Half 5.7L V8 GAS Automatic 4 Speed Standard Cab Pickup
  Added May 2013 • 25 Fuel-ups

  Property of citylies

• 8.2 Avg MPG

• 1978 Sierra Classic

  1978 GMC C15 Sierra Classic 5.7L V8 GAS Automatic 3 Speed Standard Cab Pickup
  Added Oct 2017 • 25 Fuel-ups

  Property of matthewmark25

• 10.6 Avg MPG

• Half Ton

  1978 GMC C15 5.0L V8 GAS Standard 3 Speed Standard Cab Pickup
  Added Feb 2015 • 11 Fuel-ups

  Property of Cadha13

• 10.8 Avg MPG