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#3024150 - 06/05/13 09:58 PM E-85. I think I'm a convert.
Grebbler Offline


Registered: 01/14/09
Posts: 83
Loc: SE Michigan, USA
I normally avoided this stuff like the plague. I used to travel a lot for work and I usually did my driving at night when open gas stations in the boonies were few and far between. I needed all the range I could get.

Now I stay around home and a nearby BP started carrying E-85 priced 60 cents below the cheap stuff. I gave it a shot and the Tahoe seems to like it.

I just finished a tank so the computer should be calibrated by now so I will start the MPG logs. The current price spread is 90 cents per gallon and I plan to stick with for awhile.

E-85 pump has a decal warning not to use additives but I wonder if I need to worry about top cylinder lubrication or the fuel pump.

Any thoughts?
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2002 Tahoe LS 4x4 5.3L
2005 Cobalt (GF)
1991 S-10 2.8L
1985 Crown Victoria 351 VV
1984 GMC Sierra 3500 3+3 Crew Cab 350

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#3024166 - 06/05/13 10:14 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
Doog Offline


Registered: 10/24/11
Posts: 6170
Loc: North Coast
Originally Posted By: Grebbler

Any thoughts?


Yeah, the price of food will double again if more corn is pushed into the fuel market and out of the feed market. In the long run we will all pay more for this folly. Plus you get worse MPGs anyway.
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#3024175 - 06/05/13 10:29 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
Andy636 Offline


Registered: 12/30/10
Posts: 746
Loc: Romania
Dang...cheap gas got even cheaper...I envy you so much guys.

Fact - Around here lots of cars are converted to LPG due to hi gas price and they are running just fine even after 7-8 years, now the LPG compared to your E85 is bone dry and doing nada for top cylinder lubrication.

If your car is a flex fuel one and you get more miles/$ from E85 I would stick with that.

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#3024177 - 06/05/13 10:32 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
DrDusty86 Offline


Registered: 01/04/11
Posts: 1491
Loc: TX
who cares, it's E-85! lol what about oil changes, some manufactures recommend short oci when running the E-85 stuff.
Worried about your fuel pump, that vintage GM truck chassis has wonky pumps that would crater rather soon/easily. The BEST advise I have for you regarding your fuel pump is to NEVER let it run below 1/4 tank as the pump is submerged in fuel to keep cool and to change your fuel filter based on the severe change interval. Back pressure can kill a weak/marginal GM pump quickly. You want to keep that filter changed to reduce back pressure. I have changed Many pumps on a 97 Z71 and an 05 Z71 with a 5.3.


Edited by DrDusty86 (06/05/13 10:34 PM)

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#3024180 - 06/05/13 10:34 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
ChevyBadger Offline


Registered: 01/14/13
Posts: 1543
Loc: Wisconsin
Can you run E85 in a 02 Tahoe? Im assuming your talking about the Tahoe in your sig. I ran it in my truck and got such bad mileage it wasnt worth the cheaper price.


Edited by ChevyBadger (06/05/13 10:37 PM)
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99 Chevy Tahoe 138k Citgo Supergard Delco filter
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#3024184 - 06/05/13 10:40 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
DrDusty86 Offline


Registered: 01/04/11
Posts: 1491
Loc: TX
Any fuel with ethonal will drop the milage. It is obvious that the op bought into the hype.

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#3024186 - 06/05/13 10:43 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
Danno Offline


Registered: 10/07/12
Posts: 1721
Loc: Northern Ontario, Canada
Mileage as in "gallons per mile" mileage?

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#3024189 - 06/05/13 10:45 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
ChevyBadger Offline


Registered: 01/14/13
Posts: 1543
Loc: Wisconsin
Yea I knew Id get less mileage but it dropped it to about 10. I usually run around 17 with 87 octane regular no lead.
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99 Chevy Tahoe 138k Citgo Supergard Delco filter
14 Buick Verano 51k F&F syn Delco filter

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#3024202 - 06/05/13 11:19 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
Rolla07 Offline


Registered: 11/05/11
Posts: 4118
Loc: MTL, CANADA
So less 25% in gas price up front but 30-40% worse mileage?whats the point?
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2007 Corolla Red Pearl 146k miles
Castrol Edge (Gold) 5w20 & Napa Gold


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#3024212 - 06/05/13 11:37 PM Re: E-85. I think I'm a convert. [Re: Grebbler]
zloveraz Offline


Registered: 04/07/10
Posts: 860
Loc: Frisco, TX
Originally Posted By: Grebbler
I normally avoided this stuff like the plague. I used to travel a lot for work and I usually did my driving at night when open gas stations in the boonies were few and far between. I needed all the range I could get.

Now I stay around home and a nearby BP started carrying E-85 priced 60 cents below the cheap stuff. I gave it a shot and the Tahoe seems to like it.

I just finished a tank so the computer should be calibrated by now so I will start the MPG logs. The current price spread is 90 cents per gallon and I plan to stick with for awhile.

E-85 pump has a decal warning not to use additives but I wonder if I need to worry about top cylinder lubrication or the fuel pump.

Any thoughts?


I'd read this: http://www.edmunds.com/fuel-economy/e85-vs-gasoline-comparison-test.html
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#3024240 - 06/06/13 01:19 AM Re: E-85. I think I'm a convert. [Re: Grebbler]
Jocephus Offline


Registered: 04/28/12
Posts: 219
Loc: AR
I drive the same route 3 times per week on highway...146 miles round trip. I Set the cruise control when I hit I-40 so for probably 130 miles i'm on the cruise control.

My Escalade with 6.2L V8
On 100% gas I get 18.4 mpg
On 10% ethanol I get 15.7 mpg
On E85 I get 13.2 mpg

I only run 100% gas now after doing the test for a month...even wrote my congressman a letter with the full supportive documentation. Heard nothing back.

I still don't understand the governments thinking of how getting less gas mileage saves fuel.
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11 Toyota Corolla (Toyota)
06 Jeep Grand Cherokee (maxlife)


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#3024290 - 06/06/13 03:41 AM Re: E-85. I think I'm a convert. [Re: Rolla07]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
Originally Posted By: Rolla07
So less 25% in gas price up front but 30-40% worse mileage?whats the point?
exactly. It actually costs more in the end because of how much more is required to get you around.
I certainly understand,and would use it myself if it the end result saved me money however in this case it costs more per mile than gasoline so at the end of the day you have less money in your pocket.
My hemi for example. I couldn't get an more than 15mpg with regular fuel in the tank but premium(100% gasoline)consistently got me 20 or more mpg. My commute is 30 miles each way on the flatest roads you ever drove and I track every tanks mileage. I very rarely do any city driving in it.
Anyways it cost 10 cents a litre so roughly 40 cents a gallon more which is roughly 10% more per fill up to get 25% better mileage. So in my case the added expense pays off.
If I did nothing but nothing but city miles my mileage dips to 10-12 mpg and never really changed no matter which grade fuel was in it,so the added expense nets no reward so there would really be no point in my case to use premium if all my miles we city miles and I'd just use regular.
Getting 6000 pounds moving is much more difficult than keeping it moving.
So if that is also the case in the op's situation then I understand using e85 however in this case I'd track a few tanks to be sure.
Are we talking about an 02 silverado?
We're they even flex fuel equipped then? If they aren't then there would be absolutely no benefit using it. The ecu will not ad timing nor compensate with enough fuel and there is potentially a risk of engine damage because the ecu will not recognize it being an oxygenated fuel and tuning won't be accurate for that high alcohol content.
If it is a flex fuel vehicle then rock on.
Put tc-w3 in with fuel.
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2006 Charger RT
Miles x 2 per oil filter

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#3024294 - 06/06/13 04:15 AM Re: E-85. I think I'm a convert. [Re: Jocephus]
ueberooo Offline


Registered: 05/02/09
Posts: 702
Loc: Portland, Oregon
Originally Posted By: Jocephus
My Escalade with 6.2L V8
On 100% gas I get 18.4 mpg
On 10% ethanol I get 15.7 mpg
On E85 I get 13.2 mpg

I only run 100% gas now after doing the test for a month...even wrote my congressman a letter with the full supportive documentation. Heard nothing back.


One highway, zero city. Just kidding. No, I totally agree with you and hope your congressman listens to the input. I think fuel should be anywhere from E0 to E10. We should only burn stale expiring grain stocks as auto fuel.

Except if it's GMO; then it's safer to burn it than have anyone or anything eat it.
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--- 1995 Subie Imp EJ18, MT, with ~ 193K miles.... Kendall 5w30. I <3 MoS2 + B + Zn ----

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#3024334 - 06/06/13 06:15 AM Re: E-85. I think I'm a convert. [Re: Grebbler]
95busa Offline


Registered: 10/15/05
Posts: 1249
Loc: Tennessee
Would you rather pay a farmer or a haji? Easy question for this guy.
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2005 Ford F250 Super Duty 4x4
2009 Dodge Grand Caravan
2014 Kia Forte KOUP- totaled by a drunk driver

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#3024420 - 06/06/13 07:55 AM Re: E-85. I think I'm a convert. [Re: Jocephus]
Miller88 Offline


Registered: 04/09/08
Posts: 12339
Loc: Onondaga County
Originally Posted By: Jocephus


I still don't understand the governments thinking of how getting less gas mileage saves fuel.


They know it doesn't.

However, the agricorps that own a lot of senators and congressmen are pretty influential. They want to sell 100% of their corn and drive the demand up.

Pretty simple.
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