InstructorPiggy got a reaction from Mazcarz in Ford Focus 1.8 TDCi
Big jump down in mpg from 60 to 70 and even bigger to 80.
Plus, the limit is 70.
What is the service history like?
Old oil and blocked fuel filter can make quite a big difference.
Plus the fuel itself, I can get an extra 4/5mpg over a whole tank if I get Shell/BP rather than cheaper fuels.
Hope these help,