Comments by "Golden Croc" (@GoldenCroc) on "How much power has my 460,000 mile Volvo 850 T5 lost? Dyno Day." video.

You are right; they dont. Its almost certainly one of those really old "truths" that might have been true at least 60 odd years ago when cars still wore out their cams, piston rings etc etc to a meaningful extent. But once its taken hold in the public consciousness it wont go away easily. Its the same as even "car people" and motoring journalists still thinks a max engine torque number in isolation has any direct influence on the performance of the car, and therefore still quote those numbers.
2