Flex fuel e85/105 octane
Thread Starter
MBWorld Fanatic!
Joined: Aug 2005
Posts: 3,466
Likes: 10
From: Southern Cali (Ontario)
Flex fuel e85/105 octane
Been mixing e85 with 91 for the last 2months. C400 & e550
Tuned or stock Ecu. blending 3 -5 gallons of e85 has given me more boost and stronger power band curve. My data log showed adding e85 mix. Would allow the engine to run .5 to 1 lbs more than running 91 alone.
http://www.mbusa.com/mercedes/benz/green#module-6
These cars were design for flex fuel
Just sharing my experience and finding. I will not respond to any other post that would enter into some scientific debate.
I usually post my finding at n54tech.com. No dyno yet but I have been tuning Amg for over 10 years I can tell you that e85 is the best thing I have run across for boosted cars.
I run same mix on my tuned for e550. Power is now bordeline unuseful
Do your research. I have and not going back to 91 only
Tuned or stock Ecu. blending 3 -5 gallons of e85 has given me more boost and stronger power band curve. My data log showed adding e85 mix. Would allow the engine to run .5 to 1 lbs more than running 91 alone.
http://www.mbusa.com/mercedes/benz/green#module-6
These cars were design for flex fuel
Just sharing my experience and finding. I will not respond to any other post that would enter into some scientific debate.
I usually post my finding at n54tech.com. No dyno yet but I have been tuning Amg for over 10 years I can tell you that e85 is the best thing I have run across for boosted cars.
I run same mix on my tuned for e550. Power is now bordeline unuseful
Do your research. I have and not going back to 91 only
Senior Member
Joined: Mar 2011
Posts: 366
Likes: 8
From: SF Bay Area
CLA-250, C-300
Been mixing e85 with 91 for the last 2months. C400 & e550
Tuned or stock Ecu. blending 3 -5 gallons of e85 has given me more boost and stronger power band curve. My data log showed adding e85 mix. Would allow the engine to run .5 to 1 lbs more than running 91 alone.
http://www.mbusa.com/mercedes/benz/green#module-6
These cars were design for flex fuel
Just sharing my experience and finding. I will not respond to any other post that would enter into some scientific debate.
I usually post my finding at n54tech.com. No dyno yet but I have been tuning Amg for over 10 years I can tell you that e85 is the best thing I have run across for boosted cars. No Dyno either, but my fastest time has bee 5.3 rolling 0-60. Amazing how much efficiency we can get out of the right fuel.
I run same mix on my tuned for e550. Power is now bordeline unuseful
Do your research. I have and not going back to 91 only
Tuned or stock Ecu. blending 3 -5 gallons of e85 has given me more boost and stronger power band curve. My data log showed adding e85 mix. Would allow the engine to run .5 to 1 lbs more than running 91 alone.
http://www.mbusa.com/mercedes/benz/green#module-6
These cars were design for flex fuel
Just sharing my experience and finding. I will not respond to any other post that would enter into some scientific debate.
I usually post my finding at n54tech.com. No dyno yet but I have been tuning Amg for over 10 years I can tell you that e85 is the best thing I have run across for boosted cars. No Dyno either, but my fastest time has bee 5.3 rolling 0-60. Amazing how much efficiency we can get out of the right fuel.
I run same mix on my tuned for e550. Power is now bordeline unuseful
Do your research. I have and not going back to 91 only
Last edited by bartola; Mar 7, 2015 at 03:25 PM.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Please confirm you have a flexfuel car. It's stated on the fuel flap &/or cap. If not E85 can do damage to elastomers & corrode parts of the fuel system. All cars are not flex fuel. It costs money to make a car flex fuel. Benz clearly denotes flexfuel cars.
Super Member
Joined: Dec 2014
Posts: 842
Likes: 64
From: Northern NJ
2015 E550 Coupe
The owners manual for my E550 says to use premium fuel only and to NOT use E85. The only thing I put in my car is 93 octane. Does your owners manual say you can use E85 without damaging anything?
Senior Member
Joined: Mar 2011
Posts: 366
Likes: 8
From: SF Bay Area
CLA-250, C-300
I have not seen any flexfuel MB, not sure.
Last edited by bartola; Mar 8, 2015 at 01:59 AM.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Johnand on the W203 forum has a proper Benz flexfuel car that will tolerate E85. Somewhere you will find the pics of all notices. Standard models are not & have never been flexfuel. Flexfuel cars are all supposed to have yellow filler caps.
