Re: does octane matter?
Well, I don't know about less gasoline per gal>>>>I remember reading about higher volitility of lower octane fuel>>tends to burn faster & can detonate much easier. If I remember correctly, when distilled (or CRACKED)oil is broken down by hydrocarbon weights> Methane>1 carbon,Propane 3 carbon atoms, Butane 4 carbon atoms,ect>>>Gasoline's volital components where broken into octane (8 carbon atoms) & heptane(7 carbon atoms)>>>octane allows greater compression before spontaneously igniting(detonation). Heptane flashes with little compression. An 87 octane rateing means the gas contains 87%octane & 13%heptane.>>>NOT MORE GAS OR LESS<br />As for using higher ratings>>>follow the manufacturers suggetion>>>Except maybe remember>>>most Plus fuel and Prem. fuels have more detergent additives. I know my car (Mercury grand Marque, dual overhead cam V8 calls for 87 octane>>REGULAR. But after the upper half of the engine had to be pulled apart at the dealer because of sever carbon buildup>>>they recommended that we use 89 octane fuel. Something to think about.
<br /><br />No advantage at all, Jamie. <br /><br />Contrary to popular opinion, "premium" gas is called premium because it is more expensive. It is NOT higher quality than regular, it is just more tolerant of high compression ratios, higher than you will find in any stock 2 stroke.<br /><br />This is a Non-repair question so I am moving it to Outboard Non-repair Discussions.
