Woah! There's a wealth of information there.
I've been told here in AU to run mine on the "premium" 98 octane fuel here because of the engine age. Which of course I'm happy to do - cleaner burn and more power .
I remember the change from leaded to unleaded here and the controversy over the potential damage to engines that would definitely occur if you didn't change valves and seats etc...
The thing I remember most though was the rotten egg smell of the "new cars"...
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