WL>          The Federal Trade Commission has obtained consent decrees
WL>against several oil companies, and is pursuing one or two more cases
WL>where the oil company has not yet settled, on the grounds that the
WL>oil companies have *falsely* advertised:
WL>          1. That higher octane is more beneficial or provides more
WL>                power in engines which were designed to run on
WL>                "regular" unleaded gasoline (usually 86 or 87 octane).
WL>          2. That higher octane gasoline is cleaner or provides
WL>                any other benefit in engines that were designed
WL>                to run on lower octane.
I can see the first one being true but I don't quite see the second one.
The chemistry is what has a lot to do with it, and it wouldn't make a
difference what engine it was in.  Basically the main difference between
leaded and unleaded engines is in the heads, and it's mainly the vavle
seats.  So if it burnt cleaner in one engine than it would have to burn
cleaner in all engines.  It can't burn cleaner in one than the other
unless it somehow helped a certain Catalyst in the convertor in one and
not the other.
-McDale
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