Is my Toyota Corolla really returning 50mpg?

I own a 2005 Toyota Corolla T Spirit 1.6. All evidence I find on fuel economy states 38-40 mpg, including your own "Real Mpg". I cover mostly motorway miles and have just calculated that I've done 50mpg, surely this can't be right?

I filled the tank up and subtracted the number of litres which were left in the tank from the amount I filled up last time and divided the miles by this amount, is this correct? I am basing this on the car having a 55 litre fuel tank.

Asked on 19 November 2016 by GB

Answered by Honest John
Do it a few more times and work out how much fuel you have used over 1,000 + miles. One trip is too much subject to error.
Similar questions
I want to upgrade my 2006 Toyota Corrolla. I have £10,000 to spend and require a reliable, stylish and economical car that will accommodate my wife and daughter. My daily commute is 30 miles and I also...
I have a Vauxhall Insignia and all seems mechanically sound with 68000 miles on the clock, a recent service and full service history plus new discs brakes all round. When I bought it I was getting around...
I am looking to purchase a 3-4 year old car. What is the best petrol vehicle that provides 55 miles to the gallon?
Related models
Comfortable, well equipped and dependable. Huge range of body styles and refined, economical chain cam engines. Rated highly by owners.