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Can the hemi run on e15?

theblet

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Biden it trying to get the epa to authorize e15 gas at the pump instead of e10 to “help”with the prices. I think it’s a bad idea, but can we even run this without ruining our engines? I’m sure the mpg will suffer.
 

mikeru82

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All gasoline powered cars and trucks produced since 2001 can run on up to e15. It's not ideal, but it shouldn't hurt anything in a vehicle that used regularly. I wouldn't fill my tank with it if I was planning on storing my truck for any length of time though. There is some fear that manufacturer's may void warranties if gas containing more than 10% ethanol is used. I'm sure it's spelled out in our owners manual or warranty information. And you're right, mpg will suffer a little.
 

Eighty

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As stated above, not ideal. But not insurmountable. If the TRX can handle it, then the peasant 5.7L Hemi can as well. :D

1649805720830.png
 

blue_by_you

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it is safe for like 90% or more of the cars on the road. drive your vehicle like people are doing now instead of letting it sit and collect dust forever and there is no concern. there were debunked "studies" years and years ago about how bad E15 was and it caused a divide in peoples opinions on it but the truth is it had no discernable impact to the safety/longevity or drivability of regularly driven vehicles. heck they even tested E30 and found the cost per mile to E15 was comparable.

for anyone else that has performance cars and running E85.......you know the benefits! E15 is nothing!
 

ferraiolo1

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All gasoline powered cars and trucks produced since 2001 can run on up to e15. It's not ideal, but it shouldn't hurt anything in a vehicle that used regularly. I wouldn't fill my tank with it if I was planning on storing my truck for any length of time though. There is some fear that manufacturer's may void warranties if gas containing more than 10% ethanol is used. I'm sure it's spelled out in our owners manual or warranty information. And you're right, mpg will suffer a little.

It is spelled out, Always read your owners manual. But our ram trucks can run up to e15


no mpg doesn’t suffer, I’ve been running it for a while now in my truck and other car. And my truck sits for weeks at a time in the winter, no issues. It runs better than 87 and is cheaper.


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Grimgreg

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The main issue from running more ethanol is the heat generated is higher. If the engine isn't designed to handle it, then major issues can occur.
 

theblet

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From my manual

5.7L Engine
Do not use E-85 flex fuel or ethanol blends greater than 15% in this engine.

I wonder how it would run tho. Will it ping and run like [email protected]? Will the ecu put even more timing? Hope I never have to find out
 

ferraiolo1

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50% more ethanol is absolutely going to negativity impact mpg

There is already a long thread about this, pretty sure you commented in it, with several people verifying it doesn’t affect mpg going from your normal 10% e blend to 15% e blend. And those who say it does have a negative impact never tried it for a long period of time.

15% e (88 octane) is also about $0.68 cheaper than mid grade and runs similar, so even if there was a slight impact, the cost savings still out weigh it.


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ferraiolo1

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From my manual

5.7L Engine
Do not use E-85 flex fuel or ethanol blends greater than 15% in this engine.

I wonder how it would run tho. Will it ping and run like [email protected]? Will the ecu put even more timing? Hope I never have to find out

Yes it will run like crap and could harm your engine since it doesn’t have the sensors.

You can buy a flex fuel conversion for these trucks, it’s basically an inline fuel sensor, since the injectors, and fuel pump can handle it. And you instantly pick up 30ish hp by running e-85. But the kit is around $1000.


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IvoryHemi

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There is already a long thread about this, pretty sure you commented in it, with several people verifying it doesn’t affect mpg going from your normal 10% e blend to 15% e blend. And those who say it does have a negative impact never tried it for a long period of time.

15% e (88 octane) is also about $0.68 cheaper than mid grade and runs similar, so even if there was a slight impact, the cost savings still out weigh it.


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Will it run noticeably different? No
Will it reduce fuel efficiency? Yes

Price difference between E10 and E15 varies by region. If you can get it $0.68/g cheaper then that would absolutely offset the lower mpg.

Around here (Chicago area) E15 is only $0.05/g cheaper
 

theblet

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Yes it will run like crap and could harm your engine since it doesn’t have the sensors.

You can buy a flex fuel conversion for these trucks, it’s basically an inline fuel sensor, since the injectors, and fuel pump can handle it. And you instantly pick up 30ish hp by running e-85. But the kit is around $1000.


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I'll probably just stay away from it if at all possible. Hope we never have to find out.
 

ferraiolo1

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I think you’re misunderstanding something.

E15 also called E88 is NOT the same as E85

E85 is mostly ethanol and is the yellow handle at the pump, and you need a flex fuel vehicle or a conversion kit to run it.

E15 is 15% ethanol and pretty much any modern vehicle can run it. It’s 88 octane. It will do your vehicle zero harm, as your manual states you can run it. In some areas it’s much cheaper than 89 mid grade and runs similar.


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ferraiolo1

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Will it run noticeably different? No
Will it reduce fuel efficiency? Yes

Price difference between E10 and E15 varies by region. If you can get it $0.68/g cheaper then that would absolutely offset the lower mpg.

Around here (Chicago area) E15 is only $0.05/g cheaper

How many tanks of it have you ran through to come to these conclusions?

It runs about the same as 89 with less pinging under load than using 87.


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ekaz

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Also to note, there are only about 2300 stations or so that sell E15. You'll have to look for it. I think there is one gas station near me that carries it but Costco 87 is still cheaper, and a top tier gas.
 

SpeedyV

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Also to note, there are only about 2300 stations or so that sell E15. You'll have to look for it. I think there is one gas station near me that carries it but Costco 87 is still cheaper, and a top tier gas.
Huh. Seems pretty common around here. But I don’t use it.
 

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