agreed...however you gloss over the small point, that all reported faults are the same - one is unfortunate, twice a coincidence, we spotted a few more than 2 with same fault though, hence voicing concern to get other view points
Re low octane usage - why doesnt the knock sensor(s) & ECU handle low compression fuels?
That's true but there are approx. 5500 350's left in the UK which means that accounting for write-offs we can safely assume there were over 6000 made. Even if 300 people have written about issues, it's still only a 5% incidence which isn't horrific for a performance car.
As I understand it, the ECU won't retard once over 5000 revs so think of it like a cheap tax for people who put 95 Ron in their cars. Nissan were like 'you want to put cheap fuel in it? Fine, but you can't floor it properly'