The maximum I have ever kept a car is 3.5 years, at which point it had done about 45000km - about 28000 miles. Been through three cars so far, but had good reasons for changing 2 of them - the first was because I was moving countries to study, the third was because I was moving countries to work. The second was for no good reason except that I wanted to. More than your resolve not to do 5 miles this month, I find the 209,000 miles figure impressive