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thats unfortunate... Ford says you can run reg in Ecoboost, wonder why?
Some EBs, not all of them. For example the ST siblings can run 87, but the Mustang EB needs 91. It's all about the tuning. The STs basically run a detuned map except for when you are at full-throttle, and then you only get the full HP for 15 seconds, which subsequently resets as soon as you lift and reapply throttle.
 

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thats unfortunate... Ford says you can run reg in Ecoboost, wonder why?
I assume you are looking at the escape stats. THat's because it runs ~15-16 psi with occasional spikes on a 2.0 engine.

The 1.4 is running 22 psi.

I'm having no luck finding the actual turbos, but I'm betting that due to displacement, the 1.4 is running a smaller turbo than the ecoboost at a higher pressure, which doesn't help. Then there's differences in how you cool the charge air. Comparing the stock abarth intercooler setup to the stock escape ecoboost core, fiat gives more surface area, but they put it in a pretty inefficient spot. Don't know how they are plumbing it on the renegade. Then of course there is cylinder design. They are both likely pent roof designs geared towards maximizing surface area. I'll bet the 2.0 has more surface area to take heat out of the charge. Then of course there are ECU games. the Ecoboost definitely does a fair amount of boost limiting, and trust me, on 87 octane it WILL be limiting boost. Less displacement likely means even if FIAT is being similarly aggressive on that front, they have to rely on boost more often, which means even if 87 won't kill it, it can make it even worse.
 

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According to the User Guide now available for download on Jeep.com, the 1.4L Turbo engine will require 91 octane fuel. The 2.4L will only require 87 octane fuel.
This has to be a typo. All other 1.4 Turbo models (Abarth, 500L, Dart) in the US are "91 recommended" but 87 is okay.

The Renegade should be no different with 87 being totally fine unless its really hot outside (>85 degrees) when you would see de-rate faster than you would with 91.
 

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I checked out the user guide and on p 186 it says 1.4L fuel 91.

It doesn't specify whether that's recommended or required but I think its safe to assume the Renegade will be like all the other 1.4's and run 87 just fine except in the hottest months of the Summer (and even then you just lost a bit of power). Check out the Dart forum if you want more info on that.
 

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13 gallon tank. Which means around 10-11 gallons to fill up when fuel light comes on. At $0.10 difference between 87 and 91 octane, you're looking at a difference of around $1.00 per fill up. If $1.00 sways you away from an engine option, you're looking at the wrong vehicle. ;)
 

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You guys only pay $0.10/gallon more for 91 octane?

Geez you're lucky!!!

Here the 91 costs $0.14/L more... which equates to about $0.53/gallon, or about $6.00 per tank. That would work out to over $600/year for myself. Not a deal-breaker personally (current car is 91 already so I'm used to it) but still... I'm jealous.
 

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You guys only pay $0.10/gallon more for 91 octane?

Geez you're lucky!!!

Here the 91 costs $0.14/L more... which equates to about $0.53/gallon, or about $6.00 per tank. That would work out to over $600/year for myself. Not a deal-breaker personally (current car is 91 already so I'm used to it) but still... I'm jealous.

If it makes you feel better, I don't know where WXMan gets his, but fairly universally in about a 25 mile radius, 89 octane is the price of 87 plus $0.14 per gallon. 93 or 91 (whatever the place sells as super/premium/whatever) is $0.34 over regular.

Back before Katrina, it used to be +$0.10 for the first bump in octane and another +$0.10 for the second.
 

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You can run 87 in the 1.4T but you will lose power and MPG's. So the cost difference you save is lost in other ways so it is not worth it to down grade.This engine is on the cautious side when it comes to it's safety so no worries there. Now I have to run 91 because mine is a tad souped up though... :0
 

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You can run 87 in the 1.4T but you will lose power and MPG's. So the cost difference you save is lost in other ways so it is not worth it to down grade.This engine is on the cautious side when it comes to it's safety so no worries there. Now I have to run 91 because mine is a tad souped up though... :0
You'll really only lose power and MPGs with in very hot weather though. Even if it's like 80 out you'll likely only cause a de-rate if driving it very hard with 87oct.
 

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You'll really only lose power and MPGs with in very hot weather though. Even if it's like 80 out you'll likely only cause a de-rate if driving it very hard with 87oct.
This engine is very sensitive to heat. Running with 91, once the outside temp starts hitting 85-90 you can feel the power drop off with normal driving. The harder you drive it, the more it drops off.
 

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I believe it. 22psi is a lot to run on 91 even.
You rarely hit 21. With the 1.4 there is a lot of protection against detonation and damage from heat. In sport mode the most I see is between 12- 16 on the boost gauge. The only time I see 21 is if the outside temps are low enough and there has been a constant airflow through the engine compartment and if I'm in 5th maybe forth gear passing a car. other than that you wont see it.

The engine compartment is pretty tight in the Fiat so that contributes to heat. I'm hoping for those that get the 1.4 in the Renegade there will be more space for air to flow and it will run cooler in the Renegade.
 
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