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I ran 93 octane for a tank and now I am back on 87. I believe I felt a difference with the 93 in regard to the initial power delivery from the engine. I felt that 93 delivered faster acceleration from a dead stop and especially at highway speeds. I was able to accelerate faster and harder while running 93. I mentioned it to an -in-law who is a long time engineer at Chrysler. He said it is entirely plausible that the engine will be able to take advantage of the higher octane fuel by manipulating its timing and potentially making more power. I will try 89 next time around.
 
Only downside for the new guys here Trent, is that the 2015's aren't flex fuel
Not true. My 2015 200S is FlexFuel. Yellow E85 gas cap and everything. :)
 
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I don't blame you for going with ethanol, it definitely burns cleaner. As far as efficiency, I don't think anyone can give you an exact number. Many gas stations blend ethanol up to 10%, which means it could be 0% or 10% or anything in between. It probably depends on how much cheaper the can get ethanol vs. gasoline.
 
Not true. My 2015 200S is FlexFuel. Yellow E85 gas cap and everything. :)
Interesting, I believe you are the first person here to report this. What engine 2.4 or 3.6? What country are you in, I'm assuming NY as in the USA?

My 3.6 definitely has a black cap and I don't recall any mention in the owners manual of E85 being suitable.
 
Interesting, I believe you are the first person here to report this. What engine 2.4 or 3.6? What country are you in, I'm assuming NY as in the USA?

My 3.6 definitely has a black cap and I don't recall any mention in the owners manual of E85 being suitable.
It's the 3.6 and I live in Long Island NY. I was also surprised. Before I got the car I saw a pic of another 2015 200 with a black gas cap plus read no FlexFuel for 2015 200's. Weird that not all models are the same in the same year.
 
E85 might be less expensive, but after looking at the web site I listed above, it doesn't look like it would save me any money with my 200. If anything, it would be more expensive annually.

Gas19City
23
Combined
32Highway
Not Available
$2,200per year
E8514City
17Combined
23Highway
$2,850per year
MSRP: $21,700 - $25,995


 
That fueleconomy.gov site is useless for deciding if it's worth using the stuff. Last I checked it, it had a $.30 spread, which makes E85 usage pointless since it's well below the break even point (which for me is around an $.80 spread). If you're in a area like mine, we're running around a $1.20/gal spread (literally just topped off for $2.04/gal vs $3.24/gal for regular!!!) and needless to say, you're more likely going have to wait for the pump to clear of other E85 users before you pull up instead of people pulling up to fill with gasoline like the guys with diesel trucks have to.
 
2015 200S E85 gas cap pics!! :)
View attachment 14490
Maybe a new yellow cap would stop mine from getting P0456 Evaporative Control System Minor Leak MILs.;)

Seriously, an interesting question, do our earlier builds really lack flex fuel capability, which has just been added lately, or did they just not have the caps available? :)

Or are flex fuel versions only being built for locales where E85 is commonplace?
 
Well I hear you can safely run 50% E85 if mixed with 50% gasoline, regardless if it's a flex fuel car or not. Check it out on Youtube.
 
I just got off the phone with my dealers service center. They didn't know that the 200 was E85 compatible at all. They are suggesting that it is most likely State or country dependent on this option.
 
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