Thread: OFF TOPIC...Premium Question?
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Old Dec 24, 2012 | 01:50 PM
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onehundred80
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From: Ontario
Default Re: OFF TOPIC...Premium Question?
Originally Posted by Chris L.
Thanks for the replies!!
Copied from the web, author unknown. True or not. Maybe it's all about over heating.
Just a note on fuel octane....Small engines are indeed designed to run and operate on regular unleaded pump gas (87 octane) and with the price of gas now a days well.....
Higher octane is meant for higher performance engines usually with higher compression ratio's. Compression causes heat, the higher the compression the higher the heat, lower octane fuels combust at a lower temp and can ignite under compression before the spark plug fires to burn the mixture (pre-ignition, detonation, pinging) Generally air cooled engines are more susceptible to this as engine temp is not regulated
It is my opinion that higher octane fuel does increase performance and burn cleaner, while it wont be noticeable on your push mower while putting around your yard, it may well show up over the life of your mower in the combustion chamber by burning cleaner and more efficiently less deposits fewer problems. If the average homeowner used 10 gallons in a season, the added cost of .10-.15 a gallon.......????

 
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