Some of these posts sound like the US manufacturers used to give better support. In 1968 we bought our first, and so far only, NEW car. It was a Plymouth, bought off the lot from vehicles left over at the end of the model year. From day 1, it had a slow leak of hydraulic fluid at the valve body on top of the steering box. Of course it was still under warranty, however long that was supposed to last. So I naively took it back to the dealer. A day or so later I was told it was all fixed. I got it back, and before I got home it was leaking just as badly. I took it back, went through the same cycle, half a dozen times. Eventually I managed to talk to their power steering guy who was given it each time to work on. He told me that there was a crack in the casting of that valve, but that the service manager was sure Chrysler would never believe that so the dealership would be out the cost of repairs, so he (the mechanic, who seemed quite capable) was told to clean off the valve each time and claim it was fixed, and eventually I would give up. I did give up: Nowadays I would probably try some legal action. But I unscrewed the compression fitting where the high pressure fluid came in from the pump, worked some Permatex into the threads, and screwed the hose back on. The car went for another 140,000 miles (and may for all I know still be going) with no further leaks there. (Screwing in the hose fitting had forced some of the Permatex back into the crack, I have always believed.) So at least fifty years ago last month Chrysler was just as willing to gyp the customer!
And does anybody out there remember the little Ford straight sixes that would saw through the rocker support tube? I had one of those. The rocker arms working off the camshaft pivoted about a tube, with oil coming from inside the tube. But some stupid designer had put the holes where oil came out of the tube on the lower side, so after 20,000 miles or less the hole in the tube got plugged up with metal worn away from the tube. So no more oil at that rocker, metal wearing away even faster. (On the upper side would have been OK, after all the oil had just come from the pump at significant pressure!)
On my engine there were two cylinders where the wear went clear through, sort of like a plumbing pipe cutter. Plenty of oil now... But a support shaft that flopped back and forth. Great for reliable valve action. I had this in a Mercury, Ford ignored the problem also in Ford cars, but I guess nobody bought this small an engine in a Lincoln or Continental...