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  #13  
Old 09-28-2015, 10:21 PM
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Re: 2016 PUG 6 cylinder

Exactly, so in reality, you are spending more dollars per mile with ethanol.
It's very difficult to find regular gas here in Quebec that doesn't have at least 10% Ethanol. However, premium gasoline has zero ethanol (mid-grade fuel has 5% since it is a blend of both regular and premium).


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  #14  
Old 09-29-2015, 07:13 AM
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Originally Posted by tiri View Post
E85 has less energy (85% Ethanol + 15% Gasoline) than 100% Gasoline. You will never get more power from that mixture, Chemistry doesn't work that way, sorry.
Sigh... I am amazed every day how many people refuse to do any research before posting on the interwebs.
The energy density affects fuel economy not the timing advancement of the motor. If the motor can inject enough fuel and air with a timing advancement more HP & lbs/ft should be produced. Thus e85 has the potential to generate more power if done properly. This is a very generalized statement about motor design and the combustion process.
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  #15  
Old 09-29-2015, 04:05 PM
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Re: 2016 PUG 6 cylinder

An energy density comparison:
Regular unleaded is 114,000BTU/gallon
E85 is slightly less than 82,000BTU/gallon
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  #16  
Old 09-29-2015, 04:19 PM
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Re: 2016 PUG 6 cylinder

I read an article saying the new Pentastar will have flexfuel capability. E85 costs more to run, but as posted above, can generate more power, as some of my racing buddies converted their road racers to run E85.
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  #17  
Old 09-29-2015, 05:10 PM
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Re: 2016 PUG 6 cylinder

AFAIK, the Pentastar is already flex-fuel...
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  #18  
Old 10-05-2015, 03:51 PM
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Re: 2016 PUG 6 cylinder

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Originally Posted by Jim_in_PA View Post
AFAIK, the Pentastar is already flex-fuel...
That's what I thought too. I swear it's on the inside of the fuel door.
I think almost every new vehicle sold in USA is.
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  #19  
Old 10-05-2015, 08:13 PM
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Re: 2016 PUG 6 cylinder

I don't know if they are still doing it with the current model year, but in previous model years, there was actually a flex-fuel medalion on the back of the Pentastar equipped JGCs.
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  #20  
Old 10-05-2015, 08:22 PM
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Re: 2016 PUG 6 cylinder

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Originally Posted by Jim_in_PA View Post
I don't know if they are still doing it with the current model year, but in previous model years, there was actually a flex-fuel medalion on the back of the Pentastar equipped JGCs.

I don't have the emblem on my 14... thankfully! I do have the E85 decal on the inside of my fuel filler door.
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  #21  
Old 10-10-2015, 11:46 PM
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Re: 2016 PUG 6 cylinder

A lot of stupid in this thread around e85. 105-108 octane for the chemists out there.
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  #22  
Old 10-11-2015, 12:21 AM
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Re: 2016 PUG 6 cylinder

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Originally Posted by Roki303 View Post
What manufactures are after these days are MPGs as they are chasing CAFE standards. I wonder what those numbers will look like on MY 2016.

Additionally, I wish good luck to all the beta testers that will purchase MY2016. Bought 2014, will never make that mistake again. Love the truck but I wish I had waited until 2015.


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And as a hopeful Hellcat powered Grand Cherokee owner, let me be the first to thank the future PUG drivers for keeping Chrysler's CAFE high enough to let me buy something that will probably get around 12MPG!
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  #23  
Old 10-11-2015, 07:42 AM
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Re: 2016 PUG 6 cylinder

Quote:
Originally Posted by elitesigs View Post
A lot of stupid in this thread around e85. 105-108 octane for the chemists out there.
Yup, higher octane (resistance to detonation) but much less energy per unit volume (what moves the vehicle).

Had a chat with a powertrain engineer at the old Newark DE plant when one of the last generations of the 4.7L was being put into production.. he said they could tune that engine to make "amazing" power on E85, but the fuel consumption was horrible..

If you don't retune, you won't get much (if any) more power from E85, and in any event your mileage will drop.
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  #24  
Old 10-11-2015, 07:50 AM
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Re: 2016 PUG 6 cylinder

Quote:
Originally Posted by tomk View Post
Yup, higher octane (resistance to detonation) but much less energy per unit volume (what moves the vehicle).

Had a chat with a powertrain engineer at the old Newark DE plant when one of the last generations of the 4.7L was being put into production.. he said they could tune that engine to make "amazing" power on E85, but the fuel consumption was horrible..

If you don't retune, you won't get much (if any) more power from E85, and in any event your mileage will drop.
True. And for the vast majority of owners, that's not a viable option.
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