Why is a younger, higher mileage car a better buy than an older, lower mileage car?

In your answer to 'Three Pointed Tsar' on 6 October you said that it is better to buy a car with mileage too high than too low. Why?

Asked on 24 November 2012 by CH, Bibury

Answered by Honest John
Generally the rule is that for the same money, a younger higher mileage car is better than an older lower mileage car because the older car is still an older car and will probably be in a higher emissions and tax category.
Similar questions
I currently drive a 2005 Volkswagen Golf Plus 2.0 TDI that has done 182,000 miles. What should I replace it with on a maximum budget of £12,000? I need a workhorse to do 20,000 miles a year (80 per cent...
I'm undecided whether to buy a petrol Jaguar F-Pace 2.5 T R-Sport or a 2.0 diesel AWD180 auto (which we have tried and is adequate). The 2.5 petrol is £3130 list more than the 2.0d. The petrol has urban...
I only do up to 2000 miles a year. A hybrid seems like a good option but I don't think I'll make it before April - am I right that then the road tax exemption ends? I want reliability and am petite so...

 

Value my car