S2000 Under The Hood S2000 Technical and Mechanical discussions.

Octane + Ethanol or just Octane?

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Old 09-28-2014, 11:58 AM
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Default Octane + Ethanol or just Octane?

I found a gas station that sells octane 92 without ethanol for 4.30$ a gallon compared to other gas stations which have octane 92 with ethanol in it for 3.80 a gallon

Which is better for our cars performance?
Old 09-28-2014, 07:50 PM
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straight gas! wow, where are you? wish they'd bring that here.

not by much i dont think, but it's a whole lot easier on all the components.
Old 09-29-2014, 04:23 AM
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100% gasoline is going to be best, though I might only pay the premium if I were going on hard drives. For normal driving I'm not sure if it would be worth an extra 50c per gallon.
Old 09-29-2014, 07:00 AM
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Yep...plain 100% gasoline is better...but getting hard to find.I'm not a chemist,but ethanol is a type of alcohol....a drying agent.Octane is a little higher and economy is less.....that's what I hear & read.

The 10% blend is common,but stay away from the E85.

You can thank the damn EPA for this mess.

\rlr
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Old 09-29-2014, 08:25 AM
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Originally Posted by SmokeyGatto
straight gas! wow, where are you? wish they'd bring that here.

not by much i dont think, but it's a whole lot easier on all the components.
Puyallup, WA just south of Seattle about 40 minutes.
Old 09-29-2014, 08:26 AM
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Originally Posted by deepbluejh
100% gasoline is going to be best, though I might only pay the premium if I were going on hard drives. For normal driving I'm not sure if it would be worth an extra 50c per gallon.
Works out to an extra 6.50$ to completely fill the car from empty to full. Doesn't seem all that bad to me.
Old 09-29-2014, 08:35 AM
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Originally Posted by Shaney
Originally Posted by deepbluejh' timestamp='1411993425' post='23348990
100% gasoline is going to be best, though I might only pay the premium if I were going on hard drives. For normal driving I'm not sure if it would be worth an extra 50c per gallon.
Works out to an extra 6.50$ to completely fill the car from empty to full. Doesn't seem all that bad to me.
For what benefit though? An extra 2-4 horsepower at 8000rpms? If you're going to the track or autocross, sure. However If you're only doing long highway trips or errand running, it's wasted money.

Where I live, ethanol free gas is 50-70 cent per gallon more than standard premium. That's a steep price to pay most of the time.
Old 09-29-2014, 09:23 AM
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100% gasoline is also better for winter storage, doesnt absorb moisture as fast.
Old 09-29-2014, 12:05 PM
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Originally Posted by redlineracing
Yep...plain 100% gasoline is better...but getting hard to find.I'm not a chemist,but ethanol is a type of alcohol....a drying agent.Octane is a little higher and economy is less.....that's what I hear & read.

The 10% blend is common,but stay away from the E85.

You can thank the damn EPA for this mess.

\rlr
Carolina

I use straight E85. High octane, burns cooler, smells good. Especially wakes up boosted cars.
Old 09-29-2014, 01:15 PM
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Originally Posted by yamahaSHO
Originally Posted by redlineracing' timestamp='1412002820' post='23349172
Yep...plain 100% gasoline is better...but getting hard to find.I'm not a chemist,but ethanol is a type of alcohol....a drying agent.Octane is a little higher and economy is less.....that's what I hear & read.

The 10% blend is common,but stay away from the E85.

You can thank the damn EPA for this mess.

\rlr
Carolina

I use straight E85. High octane, burns cooler, smells good. Especially wakes up boosted cars.
I may be wrong, but I'm pretty sure unless you've correctly modified your fuel system (injectors + pump) running straight E85 on a stock car can be dangerous.

But like I said, I may be wrong... We don't have a single E85 station where I live, and the closest ONE is an hour drive away, and it's the only one in that city.


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