Its not racer boy mythology.
Yes it is. For a family car its complete BS. There is ZERO evidence that there is a ring seal problem on the majority of regular cars that havent been broken in your way, and even the claim that "transmissions are broken in at the factory" are also horsesh*te. Stuffs simply machined better these days. Turn the key and drive, dont be a maniac, and change the oil. Tada! Your car goes 100K w/o blinking.
I would be very suprised if a car didnt do 100k - in fact I would be quite put out! I expect 200k+ from an engine these days - 90 hours on a racing engine though..
Its NOT BS - its already been done in 9/10 cases, so there is no *need* to do it! The only time you have to be careful is when you replace a major part like a camsaft or a crankshaft or a main bearing etc.
