There is a huge difference between the miles per gallon performance that is promised by automakers and advertised all across the nation and the actual fuel performance experienced by drivers.
Experts believe that this is due to the standard tests the federal government requires as opposed to actual road tests, which would align most appropriately with the user’s day to day life. Some believe that this misinformation can lead many to believe they are purchasing economic and efficient vehicles when in reality they are simply being led to believe so.
For more on this subject, read the full article here:
Here’s Why Real-World MPG Doesn’t Match EPA Ratings