So, seeing this post I looked up on the database how many we cars were currently owned for more than 30 years ( according to the database Chris your ownership will be 37 years in October
) . There is ( however ) quite a few and the top prize being a 54 year ownership of an Aurelia. There are 39 vehicles ( of any model ) registered with 30 or more years current ownership - and bear in mind we don't have the complete picture ( probably never will ) - but it's a nice thing to know !
Generally, there are a lot less where the owner has owned the car since new ( only 4 ! ) but quite a few where the owner has had the car since it was five years old ( 21 vehicles )