93 octane not available in California
Regardless of Octane numbering, CA does have one of the highest restriction/regulated gasoline in the states. All supposedly for the environment and most are power robbing. One of the reasons we just can't supplement our supply from other states during shortages, therefore we pay one of the highest average per gallon price in the nation.
There are different ways to obtain the octane rating. I'm not sure if it is the same for the other states, but CA rating takes the average, (M + R)/2 method. The 93 octane (i believe is the Research Octane Number (RON)) in other states is equivelant to the 91 octane in CA. (93 (RON or Research Octane Number) + 88 (MON or Motor Octane Number)) / 2 = ~ 91octane = DON or Road Octane Number. Premium gas is anything over 90. I think the other states just use the higher rated number. But don't quote me on it. Or it could be just because of our air pollution/gasoline regulations. This is my guess.
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Motor Octane
The octane as tested in a single-cylinder octane test engine at more severe operating conditions. Motor octane number (MON) affects high-speed and part-throttle knock and performance under load, passing, climbing, and other operating conditions. Motor octane is represented by the designation M in the (R+M)/2 equation and is the lower of the two numbers.
Research Octane Number (RON)
The octane as tested in a single-cylinder octane test engine operated under less severe operating conditions. RON affects low-to medium-speed knock and engine run-on. Research Octane is presented by the designation R in the (R+M)/2 equation and is the higher of the two numbers.
=======================
There are different ways to obtain the octane rating. I'm not sure if it is the same for the other states, but CA rating takes the average, (M + R)/2 method. The 93 octane (i believe is the Research Octane Number (RON)) in other states is equivelant to the 91 octane in CA. (93 (RON or Research Octane Number) + 88 (MON or Motor Octane Number)) / 2 = ~ 91octane = DON or Road Octane Number. Premium gas is anything over 90. I think the other states just use the higher rated number. But don't quote me on it. Or it could be just because of our air pollution/gasoline regulations. This is my guess.
=====================
Motor Octane
The octane as tested in a single-cylinder octane test engine at more severe operating conditions. Motor octane number (MON) affects high-speed and part-throttle knock and performance under load, passing, climbing, and other operating conditions. Motor octane is represented by the designation M in the (R+M)/2 equation and is the lower of the two numbers.
Research Octane Number (RON)
The octane as tested in a single-cylinder octane test engine operated under less severe operating conditions. RON affects low-to medium-speed knock and engine run-on. Research Octane is presented by the designation R in the (R+M)/2 equation and is the higher of the two numbers.
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Last edited by WYSIWYG; Apr 3, 2006 at 08:21 PM.
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From: Los Angeles
Yeah--wouldn't try that.
I run a blower in my jeep and without having a piggyback system, would need 93 octane...91 would ping like hell.
Instead, running a new computer to control everything helps out with running 91 or 89 octane.
I run a blower in my jeep and without having a piggyback system, would need 93 octane...91 would ping like hell.
Instead, running a new computer to control everything helps out with running 91 or 89 octane.
Originally Posted by WYSIWYG
Regardless of Octane numbering, CA does have one of the highest restriction/regulated gasoline in the states. All supposedly for the environment and most are power robbing. One of the reasons we just can't supplement our supply from other states during shortages without, therefore we pay one of the highest average per gallon price in the nation.
There are different ways to obtain the octane rating. I'm not sure if it is the same for the other states, but CA rating takes the average, (M + R)/2 method. The 93 octane (i believe is the Motor Octane Number (MON)) in other states is equivelant to the 91 octane in CA. (93 (RON or Research Octane Number) + 88 (MON)) / 2 = ~ 91octane = DON or Road Octane Number. Premium gas is anything over 90. I think the other states just use the higher rated number. But don't quote me on it. This is my guess.
=====================
Motor Octane
The octane as tested in a single-cylinder octane test engine at more severe operating conditions. Motor octane number (MON) affects high-speed and part-throttle knock and performance under load, passing, climbing, and other operating conditions. Motor octane is represented by the designation M in the (R+M)/2 equation and is the lower of the two numbers.
Research Octane Number (RON)
The octane as tested in a single-cylinder octane test engine operated under less severe operating conditions. RON affects low-to medium-speed knock and engine run-on. Research Octane is presented by the designation R in the (R+M)/2 equation and is the higher of the two numbers.
=======================
There are different ways to obtain the octane rating. I'm not sure if it is the same for the other states, but CA rating takes the average, (M + R)/2 method. The 93 octane (i believe is the Motor Octane Number (MON)) in other states is equivelant to the 91 octane in CA. (93 (RON or Research Octane Number) + 88 (MON)) / 2 = ~ 91octane = DON or Road Octane Number. Premium gas is anything over 90. I think the other states just use the higher rated number. But don't quote me on it. This is my guess.
=====================
Motor Octane
The octane as tested in a single-cylinder octane test engine at more severe operating conditions. Motor octane number (MON) affects high-speed and part-throttle knock and performance under load, passing, climbing, and other operating conditions. Motor octane is represented by the designation M in the (R+M)/2 equation and is the lower of the two numbers.
Research Octane Number (RON)
The octane as tested in a single-cylinder octane test engine operated under less severe operating conditions. RON affects low-to medium-speed knock and engine run-on. Research Octane is presented by the designation R in the (R+M)/2 equation and is the higher of the two numbers.
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