E85 tune?
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Member
Joined: Jun 2021
Posts: 106
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From: Buffalo, NY
2014 AMG E63 S212 | 2018 Alfa Romeo Giulia Ti Sport Q4
E85 tune?
I have seen talk of an E85 and flexfuel tune for the M157 but i wanted to know if anyone here has had any long-term experience. My E63s is my daily. Love her to pieces. My plan is to finish every ounce of differed maintenance myself (quote from MB was close to 12k, parts alone by myself i can get that down to 3-4. tops.) and have already done quite a lot of it.
I am interested in the long term effects on this engine, I'm at 95k on the odometer and after the past 4 years going though 9 cars I have decided to keep this one until the literal wheels fall off. That being said, I am looking at E85 from an economic standpoint, and the performance gains as a perk.
I am interested in the long term effects on this engine, I'm at 95k on the odometer and after the past 4 years going though 9 cars I have decided to keep this one until the literal wheels fall off. That being said, I am looking at E85 from an economic standpoint, and the performance gains as a perk.
Super Member
Joined: Nov 2010
Posts: 695
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From: USA
m157 SL63
From an economic standpoint, it doesn't really makes sense. E85 takes about 30% more fuel content than normal gas, so it would need to be about 30% cheaper to make up for that ... and that is without covering the $2k+ for the tune. Where I'm at, gas is about $4.09 for e85 and $4.59 for 93 octane which is not enough cheaper to cover the mileage hit.
The ethanol tunes for m157 with stock fueling are normally capped at e40. If your gas station actually has e85 (the content varies, but is normally a little less), that is a 1.5:1 ratio of normal 93 octane to e85.
All that said, it is likely the most effective dollar-for-dollar performance benefit. I have a Eurocharged ethanol tune, and it made a huge impact.
The ethanol tunes for m157 with stock fueling are normally capped at e40. If your gas station actually has e85 (the content varies, but is normally a little less), that is a 1.5:1 ratio of normal 93 octane to e85.
All that said, it is likely the most effective dollar-for-dollar performance benefit. I have a Eurocharged ethanol tune, and it made a huge impact.
Out Of Control!!
Joined: Jun 2004
Posts: 13,799
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2014 E63S; AMS 100 octane ECU dyno tune; EDOK TCU tune; BB intakes; sprintbooster
I have the following tunes on different ecu's for over 10k miles (swapping between)
- ams 93 octane
- ec e40
- ams 100 octane
no issues with this being my DD.... so long as you don't romp on it constantly and treat it like a Camry for 90% of your commute you're fine
- ams 93 octane
- ec e40
- ams 100 octane
no issues with this being my DD.... so long as you don't romp on it constantly and treat it like a Camry for 90% of your commute you're fine
