Re: Should I be burning 93 octane fuel?

Posted by John T on September 23, 2007 at 05:53:03 from (66.244.83.147):

In Reply to: Should I be burning 93 octane fuel? posted by Butch WI on September 23, 2007 at 03:56:14:

I wouldnt burn any higher octane gas then absoulutely necessary to prevent pre ignition spark knock, so unless your tractor has been modified for higher compression that would likely be 87. Higher octane gas is designed purposely harder to ignite (avoid pre ignition) so why use it and perhaps have a less efficient burn and left over products??? If there were more lead in it would be one thing which may help reduce valve wear but if its still unleaded I see no reason for its use unless you raise the compression.

John T

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