Graph of MPG/fuel economy vs. speed, 2004 Aveo sedan (automatic)

[MetroMPG]

Here's a graph of what MPG (U.S.) you could roughly expect to get at a steady speed (cruising) in similar conditions with a 2004 automatic.



(Reposted with permission: by "slobro" from: Speed vs. Fuel Economy - 2004 Chevrolet Aveo sedan (1.6 L, 4-sp automatic)- EcoModder.com )

Readings were taken with a ScanGauge calibrated to this car, repeated over the same test route, with the reading reset & read at the same points along the route.

Note the best fuel economy is in the highest gear with the torque converter locked at the lowest engine RPM. Speed kills... MPG! Once in top gear, it only goes down as MPH goes up. (This would be the same trend for manual transmission Aveos too, though the MPG figures would be a bit higher at a given speed.)

A/C was off for the test.

Test conditions:

Temp: 69F
Pressure: 30.29"
Avg Wind Speed: 2.53 mph
Road Length: 0.85 miles, slightly inclined

Raw data:

Speed(mph) South(mpgUS) North(mpgUS) Average(mpgUS)
__________________________________________________ _______
25-------------38.5-------------40.5-------------39.5
30-------------40.3-------------43.3-------------41.7
35-------------41.2-------------45.6-------------43.3
40-------------40.1-------------47.0-------------43.3
45-------------38.7-------------45.1-------------41.7
50-------------41.5-------------46.7-------------43.9
55-------------38.9-------------42.0-------------40.4
60-------------36.2-------------38.5-------------37.3
65-------------33.7-------------37.2-------------35.4
70-------------32.8-------------35.1-------------33.9

(More speed vs. fuel consumption graphs: Speed vs. MPG charts (post 'em if you got 'em) - EcoModder.com )