If there is enough juice left in Battery, why it would run on Gas if battery is not depleted fully.Is this an option which a Driver control or jeep has his own intelligence to deliver power to Battery or Gas.
I would say use the Battery first then switch to Gas.
There is a lot of chatter online if you read through FORM. I believe it stands for fuel oil refresh mode. The nature of a hybrid the vehicle will run the gas motor even when it has battery range to protect and extend the longevity of the motor power train. Sometimes it is to remove moisture from the oil and I believe this is the common culprit of cold weather climate FORM. The other is fuel refresh and I assume why I’m in that mode. The programming must have determined the fuel in it gas tank is getting too old and needs to be used.
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There are 3 main reasons for FORM
-Fuel dilution in the oil
-Stale fuel
-Spark plugs need ran
It wants to see a minimum of 4 gallons of new gas put in every 90 days or so to keep the fuel fresh.
The spark plugs need ran occasionally to keep them performing well.
Fuel in the oil is really the main one that gets people stuck in FORM for extended periods of time. PHEVs, direct injected engines, and turbo charged engines all tend to build fuel up in the oil in certain conditions. A turbo charged, DI, PHEV much more so. The oil monitoring system in the jeep calculated the dissolved fuel load in the oil continuously. If it starts to build up, it’ll first go into step 1 of FORM which will force the engine to stay on during a drive cycle if it’s triggered. If it builds up further, it’ll go into step 2 of FORM which forces the engine on from start and doesn’t allow electric only use at all. If it gets really high, step 3 of FORM demands an immediate oil change.
I can go into a much longer technical diatribe about why fuel ends up in the oil, what the potential consequences are, and how its mitigated if anyone cares.
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This looks way better than the configurator. Excited for my Gobi order, I just hope the numbers continue to make sense to move forward when it arrives.
so people are driving a 5000+lb brick for months and only using like 130hp, that must be fun
Not even remotely what happens.
When in FORM, the jeep doesn’t allow for electric-only use. It forces it to behave as a mild hybrid, where power is delivered by both the gas engine and the electric motors.
Unless what you’re saying is that when not in FORM, they’re able to drive in electric mode, which is only 130hp… which also isn’t what happens. When in electric mode, the gas engine will still come on whenever demand is such that it’s needed (either due to hvac demands, acceleration demands, etc)… it simply requires more demand in electric mode than it does in hybrid mode.
but arent you saying it gets to that mode because people are only using all electric?
FORM for stale fuel or for spark plugs is a result of primary electric only use, yes. With that said, in normal driving, the high amount of low down torque makes it pick up quite nicely with only 130 hp.
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Lol how about we put a hyperlink to the FORM page from the vehicle manual and let people read it themselves.
To be fair, the FORM page in the manual doesn’t provide a whole lot of detail/context as to the what or the why.
Just to run by everyone, sometimes i am fully charged with only 12 hours on 120v. Also, warm days i am seeing range of 32 miles. Anybody getting this?
I don’t think I’ve seen quite 32 miles listed as the range, but I have seen 30… and 12 hours is about right for what I usually experience.
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Thanks for your explanation. Much more helpful than the manual. I’m not complaining, it’s a natural part of owning a phev. What is interesting I monitored the hybrid app and it acted differently in form than regular hybrid when the pack is fully depleted. I’m he gas motor did not provide alot or power, the battery did more of the heavy lifting. The motor was running but was not working as hard as when the pack is fully depleted. The guess o meter mpg did not decrease either, about 41.5 mpg after 1600 miles.
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In form, with the battery charged, it seems to behave more like it does in either hybrid with the engine running or in manual mode. I always seem to get about a 40% electric/60% ice split on the kW output in those modes, at least when there is charge left in the battery.
Best range estimate on full charge I have seen so far is 28. The Jeep supplied level 1 charger usually took closer to 16 hour range for a full charge at my home.
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So Jeep display provide you the mileage like 41.5mpg as you mentioned and thats combination of electric and Gas… Thats not bad with Gas prices going higher. Guess you using Regular or Premium.
Having had two BMW PHEV now for three years, driving hundreds of miles EV-only, the Bimmers have never once used the ICE when in electric mode with battery juice left. I get the concept of the ‘why’ for the 4xe, but it’s interesting that other PHEVs don’t seem to have this FORM issue, at least not commonly.
I think the mpg on the 4xe is doing an mpge conversion. I’m just using regular 87 octane gas.
I drove a BMW 530e for 3 years. For one stretch (during COVID work at home) I drove over a year without the gas engine coming on. No FORM nonsense like Jeep.
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