On Sat, 23 Jun 2012 17:57:45 -0400, Jack Legg
wrote Re Is 89 or 93 octane gas slicker?:

http://www.tampabay.com/news/busines...epairs/1235927

"Spivey recommends using gasoline with an 89 or 93 octane rating, if you
can afford it. The fuel is slicker, which means it won't hang around on
your engine valves and other internal parts, eating away at the rubber."

Is this true?

No.