wow - you're a nice bunch :-) and hello back! I think you're right, I shouldn't worry too much as I won't add to any further damage if any's been caused. I'll definitely ask the question, "is it right you have to run these on premium fuel, or does it not really matter?" and see what they say If they say, "ah no, I've been running it on 95 for years" then i'll be out of there.