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Open Roads Forum  >  Tow Vehicles

 > 100% Gasoline vs 10% Ethanol

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SoonerWing03

Oklahoma

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Posted: 04/26/19 01:08pm Link  |  Quote  |  Print  |  Notify Moderator

I have always heard that 100% gasoline is better for your engine. I have always payed a premium for 100% gasoline versus gasoline with Ethanol whenever possible. The other day I stumbled across and article that said this is basically an Oklahoma thing and that in OK gas stations that carry both sells are split 50/50. Am I wasting my money trying to avoid the Ethanol? Or is there value in using the Ethanol free gasoline?

This is more of a general daily driver question excluding towing.

Turtle n Peeps

California

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Posted: 04/26/19 01:23pm Link  |  Quote  |  Print  |  Notify Moderator

You gain nothing other than about 3% better fuel mileage.

Some can make some very, very small arguments for E0 in small engines but even that doesn't wash really. I have been using E10 since the early 80's and never had a problem.

BTW are you sure premium does not have E in it? That's how most states get their octane up. E is cheap so if they dump it in regular gas they can bring up the octane for cheap. That's how it's done in Calli for sure.


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SidecarFlip

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Posted: 04/26/19 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

The only downside to 10% is the fact that if the gas sits around very long it turns to junk (without a good stabilizer like Marine Stabil. I buy non e gas for my lawnmowers.


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fj12ryder

Platte City, MO

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Posted: 04/26/19 01:45pm Link  |  Quote  |  Print  |  Notify Moderator

Gasoline with alcohol in it can be a little hard on rubber lines on older vehicles, not so much with vehicles sourced to run with a little alcohol.


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Campfire Time

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Posted: 04/26/19 01:53pm Link  |  Quote  |  Print  |  Notify Moderator

I'm not even convinced that you get better mileage from 0%. The computer in a modern vehicle controls every aspect of the ignition system and knows what fuel you are burning. It adjusts accordingly. Of course, YMMV as they say.

In other words you really should just test it out. Run a couple of tanks of each and compare.


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Sam Spade

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Posted: 04/26/19 02:40pm Link  |  Quote  |  Print  |  Notify Moderator

Campfire Time wrote:

I'm not even convinced that you get better mileage from 0%.


You don't have to believe it for it to be true.
It IS true.
The alcohol contains 10% less energy content.

And the computers don't control "everything".
There is no "octane" detector and no ethanol detector either.


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Lynnmor

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Posted: 04/26/19 03:49pm Link  |  Quote  |  Print  |  Notify Moderator

Campfire Time wrote:

I'm not even convinced that you get better mileage from 0%. The computer in a modern vehicle controls every aspect of the ignition system and knows what fuel you are burning. It adjusts accordingly. Of course, YMMV as they say.

In other words you really should just test it out. Run a couple of tanks of each and compare.


There is less energy in ethanol and the computer cannot adjust for that.





GeoBoy

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Posted: 04/26/19 03:59pm Link  |  Quote  |  Print  |  Notify Moderator

SidecarFlip wrote:

The only downside to 10% is the fact that if the gas sits around very long it turns to junk (without a good stabilizer like Marine Stabil. I buy non e gas for my lawnmowers.

^ This.

LanceRKeys

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Posted: 04/26/19 04:08pm Link  |  Quote  |  Print  |  Notify Moderator

I only buy it for the cars and small engines that I rarely drive.

thomasmnile

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Posted: 04/26/19 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

Wawa stores in my neighborhood sell ethanol free with an 89 octane rating. Was buying it for the car til the price jumped to a near 70 cent/gal price difference from 87 octane/E10. Frankly didn't see a huge difference in fuel mileage between the two. The availability of it is a blessing for boat owners and landscape crews though.

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