Octane rating when mixing Regular gas (93octane) with Racing fuel (110) octane.

[bob32268]

Was talking with a friend on this, he says the Regular Gas (93 Octane) will Degrade the Racing gas (110 octane). I always thought it was the opposite. If you have and 20 gallon fuel tank and have 10 gallons of Regular 93 Octane gas and add 10 gallons of Racing Fuel at 110 Octane; what would be the Octane rating of the mixed fuel in the 20 gallon tank ? I'd say it would be somewhere around 101 octane. What say you on this ? I know you could run all 20 gallons of Racing fuel but at $12.00 per gallon that would be a $240.00 fill-up, can't afford this. Also, the 10% Ethanol in the 93 octane gas comes into the picture.... Also, what about mixing with Aviation gasoline.... I've heard good and bad on this, something like AvGas has additives to keep airplane carbs from icing up in higher altitudes. Any views on this ? This mixed gas is for my 69 Charger with a 383 Magnum engine, stock rebuild.
Tks
Bob32268

 

[WileE]

So... you're saying you want to use a mix of 93 octane and 110 octane for a stock 383 ?

 

[pnora]

Was talking with a friend on this, he says the Regular Gas (93 Octane) will Degrade the Racing gas (110 octane). I always thought it was the opposite. If you have and 20 gallon fuel tank and have 10 gallons of Regular 93 Octane gas and add 10 gallons of Racing Fuel at 110 Octane; what would be the Octane rating of the mixed fuel in the 20 gallon tank ? I'd say it would be somewhere around 101 octane. What say you on this ? I know you could run all 20 gallons of Racing fuel but at $12.00 per gallon that would be a $240.00 fill-up, can't afford this. Also, the 10% Ethanol in the 93 octane gas comes into the picture.... Also, what about mixing with Aviation gasoline.... I've heard good and bad on this, something like AvGas has additives to keep airplane carbs from icing up in higher altitudes. Any views on this ? This mixed gas is for my 69 Charger with a 383 Magnum engine, stock rebuild.
Tks
Bob32268

You do not need rocket fuel. Get the best premium. My 528 hemi runs perfect on Shell non-ethanol premium pump gas. When mixing you would need a degree in fuels to get it right.

 

[Jerry Hall]

Wasting your money on racing fuel. A stock 383 will run ok on 93 octane. Most of my cars run a mix of 90 octane no ethanol and aviation fuel. 50/50. I have recently found an octane booster that actually works. It's called Boostane. 2 1/4 oz. Boostane to 5 gallons of 90 octane no ethanol raises the octane from 90 to 96 per their chart. I still use the aviation fuel mix on my Hemi cars, but the 440's and 383's run great with the Boostane mix. Buy the professional or marine Boostane as it works best.

 

[j-c-c-62]

Was talking with a friend on this, he says the Regular Gas (93 Octane) will Degrade the Racing gas (110 octane). I always thought it was the opposite. If you have and 20 gallon fuel tank and have 10 gallons of Regular 93 Octane gas and add 10 gallons of Racing Fuel at 110 Octane; what would be the Octane rating of the mixed fuel in the 20 gallon tank ? I'd say it would be somewhere around 101 octane. What say you on this ? I know you could run all 20 gallons of Racing fuel but at $12.00 per gallon that would be a $240.00 fill-up, can't afford this. Also, the 10% Ethanol in the 93 octane gas comes into the picture.... Also, what about mixing with Aviation gasoline.... I've heard good and bad on this, something like AvGas has additives to keep airplane carbs from icing up in higher altitudes. Any views on this ? This mixed gas is for my 69 Charger with a 383 Magnum engine, stock rebuild.
Tks
Bob32268

110-93=17 points
If a 1:1 mix, new octane would be 101.5
There is likely to be a slight power loss when used with a stock motor in almost all normal driving conditions. one exception might be trying to accelearate on a 5 degree hill pulling a 5000lb trailer against a headwind in 90F at 6,000' altitude with the AC on.
I hope you get my point.

 

[pnora]

110-93=17 points
If a 1:1 mix, new octane would be 101.5
There is likely to be a slight power loss when used with a stock motor in almost all normal driving conditions. one exception might be trying to accelearate on a 5 degree hill pulling a 5000lb trailer against a headwind in 90F at 6,000' altitude with the AC on.
I hope you get my point.

Don't bet on it. There is a lot more to the chemical balance when trying to blend fuel at a 1 to 1 ratio.

 

[j-c-c-62]

Don't bet on it. There is a lot more to the chemical balance when trying to blend fuel at a 1 to 1 ratio.

So enlighten us, until then, my bet stays.

Your response sounds like the market team promoting mixed at the pump custom blended Sunoco back in the day.

 

[pnora]

So enlighten us, until then, my bet stays.

You responded to a post that none of us know anything about the fuels being mixed. Lead or no lead? Ethanol or non ethanol? I like to come here over Moparts to avoid *** hats.

 

[Jerry Hall]

If your car is tuned right, put the mix of your choice in the tank, then go for a ride. Stick your foot in it and if it doesn't detonate, you are good on octane. It's not rocket science.

 

[RR Fan Dan]

First you need to calculate the percentage of each fuel that will be in the final mixture. Then, use this equation to find your octane:

( [ % Fuel A ] x [ Octane of Fuel A ] ) + ( [ % Fuel B ] x [ Octane of Fuel B ] ) = Octane of Mixture

So mix 10 gallons of 110 with 10 gallons of 93 and you want to know the octane of the resulting 20 gallon mixture.

The percentage of 110 in the mix is 10/20 = 0.50(50%).

The percentage of the 93 in the mix is 10/20 = 0.5 (50%).

Plugging the information into the equation:

(0.5x 110) + (0.5x 93) = 55+ 46.5 = 101.5

So the octane of the resulting mixture is 101.5

 

[WileE]

Why so much fuss for an engine that does not need any of that ?

 

[pnora]

First you need to calculate the percentage of each fuel that will be in the final mixture. Then, use this equation to find your octane:

( [ % Fuel A ] x [ Octane of Fuel A ] ) + ( [ % Fuel B ] x [ Octane of Fuel B ] ) = Octane of Mixture

So mix 10 gallons of 110 with 10 gallons of 93 and you want to know the octane of the resulting 20 gallon mixture.

The percentage of 110 in the mix is 10/20 = 0.50(50%).

The percentage of the 93 in the mix is 10/20 = 0.5 (50%).

Plugging the information into the equation:

(0.5x 110) + (0..5x 93) = 55+ 46.5 = 101.5

So the octane of the resulting mixture is 101.5

Nice copy and paste. Fine when comparing apples to apples.

 

[RR Fan Dan]

Don't bet on it. There is a lot more to the chemical balance when trying to blend fuel at a 1 to 1 ratio.

He is correct at 101.5 at a 50% mixture of both. See my post above

 

[RemCharger]

Chemical engineering. So easy a 6 yr old could blend the fuels for you.

 

[WileE]

Chemical engineering. So easy a 6 yr old could blend the fuels for you.

" It's blue, Joey. We got it !! "

 

[RR Fan Dan]

Nice copy and paste. Fine when comparing apples to apples.

Dude, It’s basic chemistry equation. Math doesn’t lie. You can use that equation to figure any of the variables. If he put 5 gallons of 110 and 15 gallons of 93 the result would be 97.25 octane.

 

[pnora]

He is correct at 101.5 at a 50% mixture of both. See my post above

Like I said apples to apples might apply. But when he says this.[[[[[ If you have and 20 gallon fuel tank and have 10 gallons of Regular 93 Octane gas and add 10 gallons of Racing Fuel at 110 Octane;]]]]] We have no idea of what each fuel is comprised of. Does lead alter any of the octane? Like I said you need a degree and a lab if things are not apples to apples.

 

[pnora]

Dude, It’s basic chemistry equation. Math doesn’t lie. You can use that equation to figure any of the variables. If he put 5 gallons of 110 and 15 gallons of 93 the result would be 97.25 octane.

So Dude I guess you do not understand apples to apples.

 

[WileE]

It's all spelled out here

 

[pnora]

It's all spelled out here View attachment 1821910

That looks like how many guys Stormy Daniels had sex with.