I have a nice little Kia Rio three cylinder diesel. No real gadgets to go wrong unless you count electric windows. Free road tax and no matter how hard I dive it the worse MPG I ever got out of it was 59. On a run I get between 62 and 70 mpg. Does me. Strange also last years mot the guy set the computer test equipment up for a petrol car until I told him it was diesel. He couldn't believe how quiet it was.