Author Topic: Gasoline  (Read 6937 times)

2112

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Gasoline
« on: April 18, 2018, 01:43:26 PM »
http://www.autonews.com/article/20180417/BLOG06/180419780/the-octane-game-auto-industry-lobbies-for-95-as-new-regular?cciid=email-autonews-daily

Of course, We use RON + MON/2 = octane but still, lets get rid of that 87 crap.

And alcohol while were at it!

mark p

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Re: Gasoline
« Reply #1 on: April 18, 2018, 04:55:57 PM »
I just hope that "if" we get to 95 octane it isn't with 15% ethanol???  ::) ???
"I don't know what the world may need, but a V8 engine's a good start for me" (from Teen Angst by the band "Cracker")

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Bigfoot

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Re: Gasoline
« Reply #2 on: April 18, 2018, 06:54:30 PM »
95 would be great!
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69mach351w

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Re: Gasoline
« Reply #3 on: April 18, 2018, 08:51:45 PM »
Waht does RON and MON mean ???

New words I haven't seen, even on the article.

67_1183

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Re: Gasoline
« Reply #4 on: April 18, 2018, 09:14:34 PM »
RON = Research Octane Number.  What the chemist says.
MON = Motor Octane Number.  What a test engine says.

Pump number is the average of the two.
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Don Johnston

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Re: Gasoline
« Reply #5 on: April 18, 2018, 09:54:55 PM »
And you have to take the refinery's word for it as there is no government or independent verification for octane ratings. Only testing by  government agents is for measurement that the pump is dispensing the gallons shown and charged.  Octane is about the level of knock in the compression of the fuel.

Corey Bowcutt

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Re: Gasoline
« Reply #6 on: April 18, 2018, 10:05:05 PM »
If that is the case it should be (RON+MON)/2=octane. Sorry that is just the engineer in me :D

kjspeed

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Re: Gasoline
« Reply #7 on: April 19, 2018, 09:30:50 AM »
Lots of good info on the Sunoco Race Fuels website: https://www.sunocoracefuels.com/ Comparisons of their fuels, locations where you can purchase and tech articles.


As for the Congressional testimony to the House Energy and Commerce Committee's environment subcommittee, I'm not going to hold my breath and hope that Congress or the bureaucrats get it right. My question would be; what is the (R+M)/2 rating of the 95 RON fuel they are lobbying for? 88? Maybe 89? And if they "pollute" that with a higher ethanol percentage, then I have vehicles that won't run well, if at all.


My Shelby has 11.5:1 CR and requires 100+ octane. I've been mixing 1/3 90 octane non-ethanol with 2/3 Sunoco purple 110 to get to about 103 which the engine seems to like. Right now the non-ethanol is about $3.33/gal and the race fuel just jumped from $8.37 to $8.62/gal. At about 10-12 MPG (the way I drive it) it's not the most economical car I own, but the smile it puts on my face is priceless! I'm thankful that I can still purchase this stuff. I just hope the government doesn't screw that up. I don't think that the auto industry lobbyists are watching out for someone like me (us).
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Bigfoot

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Re: Gasoline
« Reply #8 on: April 19, 2018, 10:42:16 AM »
Hard to find 110 fuel for under those prices.
I run 100 unleaded exclusively at the track.
The 110 leaded  is the same cost.
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Bigfoot

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Re: Gasoline
« Reply #9 on: April 19, 2018, 10:49:54 AM »
I’ve been told that mixing various fuels will give you the octane number one is looking for but changes the oxygenated properties of the fuel dramatically.
Which probably isn’t important for a street car but worth mentioning anytime we are paying up for race fuel.
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69mach351w

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Re: Gasoline
« Reply #10 on: April 19, 2018, 11:06:31 AM »
RON = Research Octane Number.  What the chemist says.
MON = Motor Octane Number.  What a test engine says.

Pump number is the average of the two.
Thanks 67_1183 8)

kjspeed

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Re: Gasoline
« Reply #11 on: April 19, 2018, 11:10:05 AM »
Mixing fuels will give you a blend of octane and/or oxygenation levels: https://www.sunocoracefuels.com/tech-article/mixing-fuels-calculating-octane
Purple gas and the 90 octane non-ethanol I use have no oxygen, but other blends do and the resulting mixture will affect how the fuel delivery system is calibrated.
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SFM6S087

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Re: Gasoline
« Reply #12 on: April 20, 2018, 04:34:14 AM »
Would someone please explain if the oxygen (weight%) matters. I see that in the chart of the various Sunoco fuels. Is a high number or a low number better? What about zero? Or should I just ignore that column?

Also, as long as you have a good octane number, does leaded matter?

I assume the fuels with “E” in the name have the dreaded ethanol. Correct?

Thanks,
Steve

jim mac

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Re: Gasoline
« Reply #13 on: April 20, 2018, 09:41:30 AM »


My Shelby has 11.5:1 CR and requires 100+ octane. I've been mixing 1/3 90 octane non-ethanol with 2/3 Sunoco purple 110 to get to about 103 which the engine seems to like. Right now the non-ethanol is about $3.33/gal and the race fuel just jumped from $8.37 to $8.62/gal. At about 10-12 MPG (the way I drive it) it's not the most economical car I own, but the smile it puts on my face is priceless! I'm thankful that I can still purchase this stuff. I just hope the government doesn't screw that up. I don't think that the auto industry lobbyists are watching out for someone like me (us).

I do pretty much the same thing, with the same MPH result. I mix 2/3 93 octane with ethanol, with 1/3 112 leaded race fuel.  Except I am paying about $11 a gallon for the race fuel.... The car really likes it though.
"If things seem under control, you're just not going fast enough" - Mario Andretti

pbf777

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Re: Gasoline
« Reply #14 on: April 20, 2018, 10:20:55 AM »
     Note that the article presented states that the U.S. needs to conform to a fuel of 95 octane, as in Europe. Based of observations of engine requirements and performance on units we ship to Europe, one realizes that the 95 octane as labeled is apparently perhaps two numbers lower in a U.S. rating process. So, don't get to excited yet!  :-\

     Scott.