The issue is WORKING, i.e. plowing, with one of the later high-compression 6-cylinder IH engines. In this case a 706 gas had a piston meltdown because the "93 octane" gas was actually 87 octane gasoline with 10% ethanol added to bring it up to 93 octane.
Seems not only does the gas have to be 93 octane, but it also has to be PURE gasoline, or else these high-compression gas engines will melt down when worked.
The old low-compression 4-cylinder engines like H's and M's and 300s and 450s will run on pretty much any sort of gasoline, even E85. Totally different animal.
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Today's Featured Article - Talk of the Town: What's in Your Tractor's Toolbox? - by Staff. This recent discussion on the Tractor Talk discussion board here at the on-line magazine drew so much response and proved to be so interesting that we wanted to share it with you here. The names of the people participating in the discussion have been left out to "protect the innocent" (to quote a once-popular television series).
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