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Question about 10% Ethanol in 87 octane #7638884
07/31/22 01:20 PM
07/31/22 01:20 PM
Joined: Dec 2006
Posts: 1,472
smithfield, virginia
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flash Offline OP
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flash  Offline OP
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Joined: Dec 2006
Posts: 1,472
smithfield, virginia
With Biden letting refineries make E15 is 87 still 10%?? Kind of confusing about if its safe for a 2018 60 Mercury Command Thrust. Also, safe travels for those heading home from the NTA convention.

Re: Question about 10% Ethanol in 87 octane [Re: flash] #7638913
07/31/22 02:07 PM
07/31/22 02:07 PM
Joined: Dec 2020
Posts: 714
Wisconsin
Scott__aR Offline
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Scott__aR  Offline
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Wisconsin
E10 ('regular' unleaded gas w/10% ethanol) is rated 87 octane. E15 (unleaded gasoline w/15% ethanol) has an octane rating of 88.

Always follow the engine manufacturer's fuel recommendations.

E15 in marine engines has been shown to be detrimental to both engine components and performance. (Note: ethanol attracts water causing corrosion.)
Mercury recommends use of a high octane, premium non-ethanol gasoline in their engines of 15 hp and higher.


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Re: Question about 10% Ethanol in 87 octane [Re: flash] #7638926
07/31/22 02:28 PM
07/31/22 02:28 PM
Joined: Mar 2012
Posts: 3,198
meadowview, Virginia
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EdP Offline
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meadowview, Virginia
The pump should say on it what product is being delivered. Usually something like "May contain up to 10% ethanol."

Re: Question about 10% Ethanol in 87 octane [Re: flash] #7638957
07/31/22 03:10 PM
07/31/22 03:10 PM
Joined: Feb 2021
Posts: 926
Wisconsin
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Mad Scientist Offline
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Wisconsin
I never run any percent ethanol in anything but daily driver cars and trucks.

Re: Question about 10% Ethanol in 87 octane [Re: flash] #7638990
07/31/22 03:58 PM
07/31/22 03:58 PM
Joined: Dec 2006
Posts: 1,472
smithfield, virginia
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flash Offline OP
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smithfield, virginia
Not one station here has it posted, reason for the question about 87.

Re: Question about 10% Ethanol in 87 octane [Re: Mad Scientist] #7639000
07/31/22 04:07 PM
07/31/22 04:07 PM
Joined: Jan 2008
Posts: 7,416
Alaska and Washington State
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waggler Offline
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Alaska and Washington State
Originally Posted by Mad Scientist
I never run any percent ethanol in anything but daily driver cars and trucks.

Ditto


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Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639001
07/31/22 04:08 PM
07/31/22 04:08 PM
Joined: Aug 2011
Posts: 37,320
james bay frontierOnt.
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Boco Offline
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james bay frontierOnt.
We put ethanol(gas line antifreeze) in our small engine gas in winter to prevent frozen gaslines etc.
Like was said-ethanol binds to the water that is in all gas and allows it to pass thru and burn up in the engine.


Forget that fear of gravity-get a little savagery in your life.
Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639197
07/31/22 08:04 PM
07/31/22 08:04 PM
Joined: Dec 2020
Posts: 714
Wisconsin
Scott__aR Offline
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Scott__aR  Offline
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Wisconsin
Originally Posted by Boco
We put ethanol(gas line antifreeze) in our small engine gas in winter to prevent frozen gaslines etc.
Like was said-ethanol binds to the water that is in all gas and allows it to pass thru and burn up in the engine.



Our gas line antifreeze is a little different down here ... isopropyl and/or methyl alcohol (methanol) depending on the brand. They (alcohols) all do the same thing ... filling the spaces between water molecules, lowering the freezing temperature of the water within fuel.


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Re: Question about 10% Ethanol in 87 octane [Re: Scott__aR] #7639219
07/31/22 08:26 PM
07/31/22 08:26 PM
Joined: Dec 2006
Posts: 52,279
Minnesota
330-Trapper Offline
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Minnesota
Originally Posted by Scott__aR
Originally Posted by Boco
We put ethanol(gas line antifreeze) in our small engine gas in winter to prevent frozen gaslines etc.
Like was said-ethanol binds to the water that is in all gas and allows it to pass thru and burn up in the engine.



Our gas line antifreeze is a little different down here ... isopropyl and/or methyl alcohol (methanol) depending on the brand. They (alcohols) all do the same thing ... filling the spaces between water molecules, lowering the freezing temperature of the water within fuel.

The Red bottle only binds do moisture and carry it out.


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Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639221
07/31/22 08:28 PM
07/31/22 08:28 PM
Joined: Aug 2010
Posts: 9,006
Asheville, NC
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charles Offline
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Asheville, NC
In NC our weights and standards group (part of Dept of Agriculture I think) inspects all pumps for accuracy and they require the ethanol designation as well.

Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639274
07/31/22 09:52 PM
07/31/22 09:52 PM
Joined: Sep 2013
Posts: 13,666
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Green County Wisconsin
anything after 2006 should be flex fuel and able to take E10 , E15 and E85 , check your owners manual

my sons 2011 F150 states e85 safe right on the gas filler

most post 2002 are good for E15 and E15 is the only thing you can get in many places


America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Question about 10% Ethanol in 87 octane [Re: Mad Scientist] #7639277
07/31/22 09:54 PM
07/31/22 09:54 PM
Joined: Jan 2014
Posts: 14,882
Central Oregon
AntiGov Offline
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Central Oregon
Originally Posted by Mad Scientist
I never run any percent ethanol in anything but daily driver cars and trucks.

X2


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Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639281
07/31/22 10:06 PM
07/31/22 10:06 PM
Joined: Sep 2013
Posts: 13,666
Green County Wisconsin
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GREENCOUNTYPETE Offline
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Green County Wisconsin
ahh mercury outboard not mercury car , I shouldn't read without my glasses on

I try not to run any ethanol in my boat motor but check the manual

Last edited by GREENCOUNTYPETE; 07/31/22 10:06 PM.

America only has one issue, we have a Responsibility crisis and everything else stems from it.
Re: Question about 10% Ethanol in 87 octane [Re: flash] #7639291
07/31/22 10:21 PM
07/31/22 10:21 PM
Joined: Oct 2008
Posts: 497
Iowa,
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eedup Offline
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Posts: 497
Iowa,
Is it possible your state has mandated ethanol so they don't need to put it on the pumps

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