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#3109583 - 08/29/13 07:52 PM Re: Engine wear and E85 [Re: HerrStig]
outdoorsman310 Offline


Registered: 08/26/13
Posts: 113
Loc: DE
dont do it!

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#3211788 - 12/09/13 10:26 PM Re: Engine wear and E85 [Re: friendly_jacek]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2506
Loc: Central Iowa
Wow. I feel a lot better using E85 in my 2013 Silverado frequently. Yeah, mpg is not like with gas, but the price differential still makes it more cost effective per mile to use. And you can tell the difference in pep via the seat dyno. E85 definitely puts regular gas to shame on get up and go.
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In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

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#3268442 - 02/02/14 08:22 PM Re: Engine wear and E85 [Re: friendly_jacek]
morris Offline


Registered: 08/24/08
Posts: 3681
Loc: ks, wichita
fine if like being locked to only one fuel. get in the middle of nowhere and only reg gasoline? so what do you with 89 octane in a 11 to 1 C.R. time for MMO.

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#3268607 - 02/02/14 10:39 PM Re: Engine wear and E85 [Re: friendly_jacek]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2506
Loc: Central Iowa
The link to the thread the OP referenced, the guy with the 11:1 CR started out the engine on Premium gasoline for 6 months before going to E85. It would have to be pretty "middle of nowhere" to not be able to get premium. I lived in Delta Junction Alaska for several years. More remote than most folks on this forum will see, and we had Premium available. Bit of a stretch that he would be locked into one fuel.

That is why I like my Flex Fuel Silverado. When combined with a Diablo tuner, I can set the high performance 93 octane tune and use two different fuels, premium and E85. If either was not available, just switch to the 87/89 octane program and can use regular, E10, or E85.
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In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

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#3268717 - 02/03/14 02:56 AM Re: Engine wear and E85 [Re: SteveSRT8]
Shannow Online   content


Registered: 12/12/02
Posts: 33696
Loc: Oz
Originally Posted By: SteveSRT8
Very nice. I agree those are some clean pistons.

I guess the camera lacked the resolution to show us the cross hatch. otherwise there should be a deep ridge.


About mid bore on the RHS piston, you can see a "holograph" for want of a better word where the diamon cross hatch is giving a sort of fresnel reflector...but the vertical lines far outweigh that image.

Given that the engine is reputedly turnign 3,600 RPM on the highway, that's a pretty low MEP, which means that the time that the rings are at TDC/BDC, they have lower pressure behind them than one turning (say) 1500RPM and needing twice the torque/MEP per revolution...less impetus for a ridge to be foremed, and less "dwell" with the piston transitioning from hydrodynamic to boundary.

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#3268809 - 02/03/14 07:13 AM Re: Engine wear and E85 [Re: friendly_jacek]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2506
Loc: Central Iowa
Came across this one on and engine using E85 for over 100,000 miles. Similar engine wear like the OP, but with a standard daily driver type of vehicle. They noticed no ridge on the cylinder, same as the link from the OP.

http://www.youtube.com/watch?v=HuOs1yap8mU
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In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

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#3474890 - 09/05/14 03:25 PM Re: Engine wear and E85 [Re: friendly_jacek]
Rosetta Offline


Registered: 07/06/14
Posts: 211
Loc: Sta Catarina, Br
And those fairy tales and myths still alive? Ow E25 will ruin your engine ... Doh
_________________________
1995 Ford Taurus 3.0 Vulcan 78k miles Mobil 1 5w30
1993 Subaru Impreza EJ16 121k miles Mobil 1 15w50
1997 Kawasaki Ninja ZX9R 38k miles Mobil 1 15w50

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#3475492 - 09/06/14 07:25 AM Re: Engine wear and E85 [Re: friendly_jacek]
TiredTrucker Offline


Registered: 01/04/08
Posts: 2506
Loc: Central Iowa
It's called the information super highway! confused
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In order to know what is bad, you have to know what is good. The question them becomes, what is the source of knowing what is good?

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#3475658 - 09/06/14 11:20 AM Re: Engine wear and E85 [Re: friendly_jacek]
Rosetta Offline


Registered: 07/06/14
Posts: 211
Loc: Sta Catarina, Br
I do use my own blends of Hydrated Ethanol (HE) HE70 to HE90's for more than a decade > I can mix any amount since the ethanol nozzle are at one foot from the regular gas, so... < My 1995 Taurus is US imported > gasoline only, original compression chamber values. It ran a lot with all the original parts and loves it! < The mileage drops about 15% at highway. City driving makes the gap wider (20% more to the thirsty side) than the highway driving. The combustion chamber (can't photo up with boroscopes) is clean and no excess carbon abrasives for the compression rings to eat up. I use K&N air filter (on original air box). It's doing 39mpg at highway cruising at 75mph. Mine came from factory with green fuel injectors, its original FFV injectors for export. Fuel pump went by last year (maybe the excess of hydrated ethanol has a hint of guilty in here) and I replaced with a 4 bar Delphy FFV, so the high amount of hydrated ethanol wont hurt a thing and the regulator makes it back to 3 bar. PCM is original gas only version though, not the FFV version. Last spark plugs are one grade hotter than the original ones.
The thing burnt about 425 gallon of pure water in its life, from the hydrated ethanol I added to the fuel mix (since in average, 8% of the ethanol I add is pure water). Ethanol fuel here is about the 92-94GL version FYI. That vapor makes my O2 sensor and catalist converter clean as a whistle, too.
Did the same in a 95 Golf GLX 2.0 8v and the Scooby. The Scooby still has the original Fuel Pump. The Subaru thing is Tough! Ethanol is about 65% the price of regular gas, so a higher consumpton still compensates.


Edited by Rosetta (09/06/14 11:29 AM)
_________________________
1995 Ford Taurus 3.0 Vulcan 78k miles Mobil 1 5w30
1993 Subaru Impreza EJ16 121k miles Mobil 1 15w50
1997 Kawasaki Ninja ZX9R 38k miles Mobil 1 15w50

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#4180147 - 08/17/16 11:10 PM Re: Engine wear and E85 [Re: friendly_jacek]
Warwagon92 Offline


Registered: 08/07/16
Posts: 2
Loc: Texas (TX)
its not from E85, Modern fuel injection has really taken the wear from engines , because it doesnt saturate the oil with fuel and dilute it, I have pulled 200k 350s from suburbans, lt1 350s from old LT1 police cars and they too still have the cross hatching from the honing and no upper ridge wear. this guys had a carb yea , but it wasn't a daily driver and while it has hard miles , it still had low miles , the cleanliness of the pistons is from the E-85. but the bore wear not so much.

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