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-   -   mpg using e85 (http://legacygt.com/forums/showthread.php?t=163974)

stikiller 06-13-2011 10:45 AM

mpg using e85
 
Hey everyone please post engine specific mods and your gas mileage using e85 just trying to get an idea of what I can be expecting. Thanks

LGT For ME 06-13-2011 04:45 PM

I was thinking about posting this exact same post, just got my car tuned w/ stg IIe and for the last half tank my computer is reading about 17.5 mpg vs my usual 21mpg on 91. But it looks like my computer is reading low as my acutal mpg is about 18.5 based on miles driven vs gallons pumped. I've only driven about 200 miles since being tuned on e85. What I will say is that my car feels like its driving smoother when under boost which helps explain my less mpg, lots of fun I will tell you that
Standard stg 2 stuff
perrin panel filter
CNT DP
08 Spec B UP
3 port
walbor fp, stock injectors
Torqued Performance road tune, mile high
My e85 tune gained approx 23hp/28tq over 91 FYI

wpmarky 06-13-2011 04:49 PM

Stg. 2 CA91 - 21mpg
Stg. 3 CA91 - 21mpg (+60 whp/tq from Stg. 2)
Stg. 3 e85 - 18mpg (+70 whp/tq from CA91)

LGT For ME 06-13-2011 05:00 PM

^^ Dont know how you calculate :eek::rolleyes::cool: per mile. Can only imagine what stg 3 w/ e85 feels likes, hopefully I"ll know soon

johnAWD 06-13-2011 05:08 PM

GT3076r
FMIC
Modded stock injectors
AVO fuel pump
3" turbo back
Custom tunes

Burning 93 I can see 22-24 mpg using cruise control, and burning e85 I get between 18-19 mpg.

bnguyenbb6 06-13-2011 05:09 PM

FWIW, grimlin(wife of owner of awdtuning here in Texas) has been trying to convince me to switch to E85 for awhile now. She says that TGV deletes make a big difference. Her mpg went from 17mpg at Stage 2 +E85 to 23mpg with just tgv deletes and an EL header.

LGT For ME 06-16-2011 03:20 PM

anyone else out there want to share their e85 mpg info. I'm at a half tank on my stg2e tune and my trip computer is showing 15.4 w/ about 120 miles so far, I really hope the computer is wrong/low. Wont be filling up for another couple days, then I'll share my 1st full tank mpg on e85 w/ just a walbro and stock fp, stock turbo

Scooby2.5 06-18-2011 09:34 AM

22-23 on pump
18 on E85

6 speed going in should get me to 20-21 on E85

AVO380
AVO TMIC
850cc
AVO Fuel Pump
Grimmspeed ported Exaust manifolds crossover
Cobb catted downpipe with taper removed
Autospeed Catback 3" exhaust

LGT For ME 06-19-2011 04:26 PM

Just filled up, 3/4 tank, 11.3 gallons and only 175 miles, 15 mpg. I talked to my tuner and were going to look at the tune cause its lower than expected. 90% city miles so I doubt I'll pick up more than 1-2 mpg. E85 is is 3.19 here vs 3.69 so I'm losing the cost per mile battle but its pretty fun...

dingbang 06-20-2011 07:52 AM

e85...mpg??...I didn't know I was supposed to get half decent gas mileage on e85...

me and my right foot are going to have a conversation...

fishbone 06-20-2011 08:43 AM

If you guys went into E85 expecting great power gains for cheap fuel, you did it right. If you went in also expecting fuel economy, you did it wrong.
Lots of info on this in other threads but usually I think the expectation is somewhere around 20% worse fuel economy. Ethanol has less energy density than gasoline.
That being said, please keep posting your experience, I want to see how far off "breaking even" E85 is (given that it is cheaper than premium). I have been considering it myself given how abuntant E85 is in Nebraska :lol:

dingbang 06-20-2011 09:05 AM

Do it for the power gains...MPG was something that wasn't a concern for me. Used a little over third of a tank going about 160ish miles when I went up to get my GrimmSpeed MBC brace installed.

I figure as long as I'm in double digits for MPG, that counts...plus my exhaust smells sweet lol

Scooby2.5 06-28-2011 09:05 PM

Quote:

Originally Posted by bnguyenbb6 (Post 3427336)
FWIW, grimlin(wife of owner of awdtuning here in Texas) has been trying to convince me to switch to E85 for awhile now. She says that TGV deletes make a big difference. Her mpg went from 17mpg at Stage 2 +E85 to 23mpg with just tgv deletes and an EL header.

Sorry but I would have to drive that car and check it myself to believe that. I don't see how TGV and ELH will up you 6 MPG....

Scooby2.5 06-28-2011 09:06 PM

Anybody running E85 with a 6 speed? Id be curious what they get. Ill let everyone know in a month or so...

LGT For ME 07-05-2011 10:44 AM

Just filled up the tank, 16.3 mpg with 30/70 city/hwy split. Not too great but keeping right up w/ a stg2+ Sti was worth it


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