ONLY Ethyl.

 

Yes av gas is higher octane. You can buy 110 octane from your local Suzuki shop maybe? A bunch of the shops I have dealt with carry it for drag racing Busa'a In Savannah they sell it at a gas station near sams club. Sweet smelling 110 makes you smile. Also the suzuki shop in statesborough sells it.

I dont know if the Harley will do well with it though??? I am sure it would burn it just fine. My owners manual says 91 or higher I believe.

 

I have 93 for my 96. I would depend on your setup. Being an older bike you can take away some timing and get to use the lower grade gas, if need be. but you power would sufferso would you fuel ecnomy. I lke it my gas station is down the street from me and they sell 100 at the pump pricey at $5.xx a gal, but it there for the taken...

 

Read your owners manual. But yes, it should run premium. You can adjust the timing with a tuner and run regular if you want.

 

Yeah.... What all those guys said!

 

everything you wanted to know about octane
but were afraid to ask, or google

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.
The name "octane" comes from the following fact: When you take crude oil and "crack" it in a refinery, you end up getting hydrocarbon chains of different lengths. These different chain lengths can then be separated from each other and blended to form different fuels. For example, you may have heard of methane, propane and butane. All three of them are hydrocarbons. Methane has just a single carbon atom. Propane has three carbon atoms chained together. Butane has four carbon atoms chained together. Pentane has five, hexane has six, heptane has seven and octane has eight carbons chained together.
It turns out that heptane handles compression very poorly. Compress it just a little and it ignites spontaneously. Octane handles compression very well -- you can compress it a lot and nothing happens. Eighty-seven-octane gasoline is gasoline that contains 87-percent octane and 13-percent heptane (or some other combination of fuels that has the same performance of the 87/13 combination of octane/heptane). It spontaneously ignites at a given compression level, and can only be used in engines that do not exceed that compression ratio.
During WWI, it was discovered that you can add a chemical called tetraethyl lead (TEL) to gasoline and significantly improve its octane rating above the octane/heptane combination. Cheaper grades of gasoline could be made usable by adding TEL. This led to the widespread use of "ethyl" or "leaded" gasoline. Unfortunately, the side effects of adding lead to gasoline are:
[ul][*]Lead clogs a catalytic converter and renders it inoperable within minutes.[*]The Earth became covered in a thin layer of lead, and lead is toxic to many living things (including humans). [/ul]
When lead was banned, gasoline got more expensive because refineries could not boost the octane ratings of cheaper grades any more. Airplanes are still allowed to use leaded gasoline (known as AvGas), and octane ratings of 100 or more are commonly used in super-high-performance piston airplane engines. In the case of AvGas, 100 is the gasoline's performance rating, not the percentage of actual octane in the gas. The addition of TEL boosts the compression level of the gasoline -- it doesn't add more octane.
Currently engineers are trying to develop air

 

Just buy toluene or xylene and make your own octane rating using hi-test unleaded. It's so easy.

 

Av Gas has not only lead but a high percentage of Toluene. It burns too hot for most normal engines and using it might just vent your piston. Use Premium.

 

[quote]ORIGINAL: DZLDR

everything you wanted to know about octane
but were afraid to ask, or google

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.
The name "octane" comes from the following fact: When you take crude oil and "crack" it in a refinery, you end up getting hydrocarbon chains of different lengths. These different chain lengths can then be separated from each other and blended to form different fuels. For example, you may have heard of methane, propane and butane. All three of them are hydrocarbons. Methane has just a single carbon atom. Propane has three carbon atoms chained together. Butane has four carbon atoms chained together. Pentane has five, hexane has six, heptane has seven and octane has eight carbons chained together.
It turns out that heptane handles compression very poorly. Compress it just a little and it ignites spontaneously. Octane handles compression very well -- you can compress it a lot and nothing happens. Eighty-seven-octane gasoline is gasoline that contains 87-percent octane and 13-percent heptane (or some other combination of fuels that has the same performance of the 87/13 combination of octane/heptane). It spontaneously ignites at a given compression level, and can only be used in engines that do not exceed that compression ratio.
During WWI, it was discovered that you can add a chemical called tetraethyl lead (TEL) to gasoline and significantly improve its octane rating above the octane/heptane combination. Cheaper grades of gasoline could be made usable by adding TEL. This led to the widespread use of "ethyl" or "leaded" gasoline. Unfortunately, the side effects of adding lead to gasoline are:
[ul][*]Lead clogs a catalytic converter and renders it inoperable within minutes.[*]The Earth became covered in a thin layer of lead, and lead is toxic to many living things (including humans). [/ul]

When lead was banned, gasoline got more expensive because refineries could not boost the octane ratings of cheaper grades any more. Airplanes are still allowed to use leaded gasoline (known as AvGas), and octane ratings of 100 or more are commonly used in super-high-performance piston airplane engines. In the case of AvGas, 100 is the gasoline's performance rating, not the percentage of actual octane in the gas. The addition of TEL boosts the compression level of the gasoline -- it doesn't add more octane.
Currently engi

 

Unocal's 100-octane racing gas contains nearly 25% Toluene. Toluene is a regular component of all pump gas. Retarding timing or enrichening the air-fuel ratio stops knock but robs power. Raising the knock threshhold with higher octane allows less retardation of spark timing and puts more horsepower at your rear wheel.

Here's the mix table for toluene:
Mixtures with 92 Octane Premium

10%...........94.2 Octane
20%...........96.4 Octane
30%...........98.6 Octane

And for Xylene:
Mixtures with 92 Octane Premium

10%...........94.5 Octane
20%...........97.0 Octane
30%...........99.5 Octane