a page about the MLM gas pill was recently added to the very good site "fuelsaving.info"
once again, the author boils his critique down to the need for solid, controlled testing to prove fuel saving claims. he rightly rejects uncontrolled on-road testing (e.g. testimonials from users) as "proof", and argues the gas pill sellers' lab "testing" falls short of providing scientifically valid evidence that their product actually works.
I have a bone to pick with the fuelsaving.info guy...He says that vtec-e was developed in the 80s (mehbe, vtec wasn't around until the very late 80s, I think) and eliminated by 92, which was the first year it existed in production cars, and has existed there since, so, at least in some respects, he is not infallible.
I believe that the early vtec-e wasn't sold in europe and I don't believe any of the hybrids are over there so it's prolly not over there now. It was in the US and Japan and Canada I believe, I'm not sure about other markets, but I do know australia got carbed civics until 95 so I doubt they got it tooooo soon. I'll send him an email with some solid links when my email is working again.