I highly doubt FCA, Jeep, or any dealer will have a fix for anything this side of a leak. They got in 10-figure hot water for emissions control software changes on the gen2 3.0 so unless someone can prove the code on these shipped vehicles is different than the code certified by EPA/CARB, they’ll be making precisely zero changes to it.
I’m not thinking any changes to emissions. I’m think maybe there is something else with in the software engine that is causing excessive def usage. If they were claiming 10k miles I would bet they came with that number from ample amount of testing that they were seeing those numbers. So something has to be causing that excessive usage
Yea there’s going to be load-related fluctuations, but what we’re seeing here is downright ridiculous... @SheddMan is using DEF at 2.5x the advertised rate under normal load. That would be like Jeep advertising combined fuel mileage of 25 and him seeing 10 in real life. @Buttercup 3.0 is seeing around 6x advertised usage towing at less than half of the towing capacity...the fuel efficiency is nowhere near the 4mpg that would be required to justify that volume of DEF to be pissed away.
Anything that affects DEF dosing will be of foremost interest to CARB and EPA. No changes happen without their approval unless it’s a change from out-of-spec uncertified code to what they used at the time of certification. At least in an overdosing error situation, CARB and EPA would have no reason to fine FCA for self-reporting it because there would be no increase in NOx in the affected vehicles like the changes that screwed them with the gen2.
10,000 miles (Jeep’s claim) is 400 gallons of diesel at 25mpg combined. That would be 12 gallons of DEF and we know it only holds 5 and change. So Jeep is claiming 1.25% of fuel use on the gen3 3.0, not 3%.
Guess I should have clarified a bit more. "Officially", from what I can find, DEF usage is 1-3%. So, if you are using over 3%, then you've got a problem. The diesel could possibly go 10000 miles, but I doubt it. My wifey's diesel Touareg would go 10000 miles on a 5gal tank of DEF, but I'm pretty sure it wasn't using the "required" amount.....hence the diesel gate fiasco.
Expect what the manufacturer stated, not 200-300% higher dosing rates. Jeep has lied enough about the 3.0 and will not be let off the hook for woefully inaccurate claims of DEF longevity.
I do wonder if they weren’t full from factory but showed full on the meter like a fuel tank will for the first hundred miles give or take after a fill up. Still wouldn’t account for a 65% reduction in DEF range. @Nihkole looks to be on track for a 60-65% reduction too. @Buttercup 3.0 hit an 87% range reduction with light towing. So far that makes zero delivered rigs on track to come anywhere close to 10,000.My warning message popped up today. So you will get a warning 500 miles before the engine will not restart. These miles were not very accurate. Mine dropped about 40 miles in approx 10 miles travelled. I had already purchased some DEF so I’ll be filling up tonight.
