Gallons per 1000 miles versus Miles per Gallon


In the USA, 28% of all energy consumed is used for transportation. Of this transportation energy, 93% comes from petroleum. Cars and light trucks account for 59% of US transportation use, with the average fuel consumption of cars in the USA being around 23 mpg...

A car with a higher fuel efficiency (higher mpg), will always use less fuel than one with a lower fuel efficiency; you should always go for the most fuel efficient car you can, but what I am showing is that similar linear increases in mpg efficiency make different improvements in fuel savings.

The more fuel inefficient a vehicle is, the bigger the improvement in fuel savings will be for a small improvement in efficiency. Replacing a car with a fuel efficiency of 10 mpg with one with a fuel efficiency of 11 mpg will save more fuel than replacing a car with a rate of 30 mpg with one with a rate of 41 mpg!

If your family really needs a huge full-size monster of a vehicle, exchanging it with even a slightly more efficient equivalent monster (possibly a hybrid?) could make a substantial difference to your monthly fuel costs. Conversely, changing an already highly efficient car into a hyper efficient car is not going to make a big change in your monthly fuel bills, even with a, potentially, large step up in efficiency.

This has been a very positive test for people seeking energy savings.