As someone who drives an 11 year old Kia Cee’d 1.6 diesel, I can only conclude you drive like Miss Daisy’s chauffeur.Last summer I had a week in Lancashire and The Yorkshire Dales.
Over the whole week my car did 65.8mpg and it's a 12yr old Kia Cee'd 1.6 diesel.
But, if your calling me out on that, you crack on.