FYI-Octane. A 93 research Octane number is not the equivalent of a pump octane number. Pump octane numbers are an average of two lab ratings. They run a Research Octane and a Motor Octane. Back in the day the only octane availabe came from a RON (research octane engine). IH and other manuals refer to that when they list octane. An 87 pump octane would be derived from a RON of 93 and a MON of 81. R+M/2. I run my 656 on 87 and it runs fine and has for years.
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Today's Featured Article - Talk of the Town: Repairin a Gas Tank - by Staff. This interesting discussion is from the Tool Talk Discussion Forum. Remember that safety is your first priority - make sure you know what you are doing before attempting a potentially dangerous activity!
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