Who actually runs 93 octane in their small engines?
Posted May 12 2011 - 11:50 AM
Posted May 12 2011 - 12:19 PM
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Posted May 12 2011 - 3:39 PM
Posted May 12 2011 - 4:41 PM
Posted May 12 2011 - 6:37 PM
The place that services all the small engines around here swears by a non ethanol 2 cycle 93 octane 50:1 premix called Tru-Fuel. It'';s guaranteed shelf stable for 2 years without any additives.
Posted May 12 2011 - 6:40 PM
Posted May 14 2011 - 9:52 PM
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Posted May 21 2011 - 8:41 PM
Posted May 24 2011 - 8:06 AM
I just googled "is premium gas cleaner than regular"
USA today- "High-test does have a potential fuel economy benefit. It is slightly denser than lower-octane gas, meaning there's a little more energy in a gallon. But the small difference is hard to measure in real-world use, and that same density can contribute to undesirable buildup of waste products inside the engine. "
My uncles gas station has 2 tanks, premium and regular. When you want middle grade (89) it mixes on the fly at the pump. All 3 grades of fuel same as far as clean goes.
Posted May 24 2011 - 12:09 PM
The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting.
The compression ratio of your engine determines the octane rating of the gas you must use in the car. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more.