I would question the nature of the mileage. For example, if you cover 10,000 miles in a diesel car but most of those journeys are short runs from cold, you will be inviting a range of mechanical problems because the engine will never reach its optimum operating temperature. We receive thousands of complaints from drivers who buy diesels for low-mileage use and most face huge repair bills for problems with the DPF (which traps harmful pollutants and burns them off) and other mechanical areas. Modern petrol cars do have PPFs (petrol particulate filters) which operate in a similar fashion to DPFs, but they seem less susceptible to blockages when use for regular trips of less than 15 miles.