> That motor was durable, tested and approved, But... Europe said: You must adjust this and that for the new legislation, and the change made a little bit of gasoline to mix in the oil and reach the belt. Problem: Gasoline eats rubber over time, and the timing belt is made of rubber.

The surface-level problem, sure. The root cause is that the "engineers" (and I lose that term loosely) decided that running a rubber belt in an oil bath internal to the engine was a good idea.

It obviously isn't a good idea, even if you could guaranteed that petrol will never mix with the oil. In the best case scenario, when the belt starts degrading (because all belts degrade), you're throwing pieces of rubber into the oil pump.

Even in the best-case scenario, the effect of that design was to reduce the cap on engine life.