I agree, but the ideas are sometimes sound.
The point I was making was, if they(AS IN THE ONES THAT DO SOME IMPROVING) did some mpg improving what would it matter?
Yes, it still could be far from what is claimed, but when one looks to improve mileage some improvements are better than none...are they not. And fuel to air mixtures in cars even at the best are far from being pushed to the limit.. So there is plenty of room for improvements.
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