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So, put gas in my Sahara for the first time on the weekend. Was able to travel just over 800km (~500 miles) on the first tank, with my consumption at about 8.8L/100km and still dropping. I'm pretty happy with that so far.
Ran into this issue though - since I filled up with "premium" gas on Saturday, my Jeep goes directly into "Fuel and Oil Refresh Mode" once started. Wtf?? It will only run on gas now.
Wondering if anyone else has experienced this or not?
The manual suggests adding at least 4 gallons of gas to get out of it ( "if" the mode was enabled because of stale gas).
Otherwise, it will turn off once the gas light comes on after burning through the current tank of gas.
If it was triggered because of engine lubrication then it is supposed to turn off after 20 min of continuous engine running.
I've tried reseating the fuel cap, switching through all driving modes, but that's about it...what else can a person do?
Tonight I will add some more gas (just didn't have time to burn through a quarter tank or so yet).
FIrst thought was bad gas possibly? I mean, I guess its possible but come on...is this thing going to be that sensitive?
Will give an update later this evening after adding more gas.
 

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It did that after adding premium fuel? Now that’s interesting. We’ve had some discussions in the Wrangler 4XE Fans group about premium fuel. The gas only owners manual says that you can use either low octane or premium. But the 4XE supplement just suggests using 87 and we’ve wondered about that. Sort of wondering if the premium fuel causes issues with some sensor or something.
 

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Interesting...My guess is this has more to do with maintaining fresh fuel and circulating engine oil than it has to do with the grade of fuel (i.e. premium vs. regular). As the 4xe is biased to run on electric, for short trips less one could be in a situation when the gas engine hardly ever runs which applies to my use case. Gasoline and oil both have a shelf life (gasoline immediate vs. oil once put into use) and most areas have varying fuel blends depending on the season and ambient temperatures. It would not surprise me if there is a 4xe algorithm that tracks gas engine usage and a "fuel and oil refresh" mode to burn through stale fuel to prevent problems associated with stale gas and oil. I am trying to encourage my 4xe to run through the first tank of gas and found that moving the shifter into 'manual shift sport mode' is the only way to keep the engine running in an attempt to burn through my gasoline. Once I empty the tank, I will add Stabil to a full tank of premium fuel or ethanol-free marine gas and then let the 4xe follow it's regular programming.
 

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Perhaps that gas wasn't as premium as it should have been? I've heard plenty of stories about water in the fuel from the station.

The difference in the manuals caught my interest too. 87 seemed to be the recommended but then it also said 91 or higher was beneficial to the 2.0, especially in hot climates, in the original manual.

It may just be the engine doesn't have to work as hard with the hybrid setup so the engineers felt it wasn't worth it in this powertrain? Although, isn't ECU timing bigger on the low/mid end with higher octane?
 
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