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What's Your Average Fuel Economy (HYBRID ONLY)?

3709 Views 152 Replies 22 Participants Last post by  lacompas
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I think average fuel economy is limited to 99 based on the artificial ceiling set by Chrysler. Also not sure if it can be reset or resets with the trip odometer.
And yes I need to clean my instrument panel.
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Thanks, but that doesn't really answer the question. So your numbers posted earlier are based on ignoring the electric contribution to the economy? Kind of a worthless exercise, no?
I'm not ignoring the electric contribution, those numbers are MPG not MPGe. I wouldn't get that mpg without plugging or regen. The cluster calculates something close to MPGe, but it's been debated what it really is and my 18 didn't calculate the same as my 22.

I'm ignoring the electric cost because mine is not metered, hence I can only estimate that cost.
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Yeah I was hoping for screenshots of the Hybrid Energy Economy display. That's the only way to work from the same yardstick.
My displayed mpg varies greatly depending on whether I’m driving cross country (~33) or if I’ve been driving in town a lot in EV mode (~80-99).
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Yeah I was hoping for screenshots of the Hybrid Energy Economy display. That's the only way to work from the same yardstick.
These mpg threads, like PSI threads, never work.
They're great ideas, but everyone calculates to win, not to educate.
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Realistically though, I think it is fairly easy with the PacHy to reach the EPA numbers of 32 mpg on gas only and 84 mpge on electric only. Other vehicles I’ve owned did not easily attain those numbers.
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Yeah I was hoping for screenshots of the Hybrid Energy Economy display. That's the only way to work from the same yardstick.
Seems like that would only work if someone drove the same way as the person to whom they were comparing. A PacHy that only goes 20 miles a day and is recharged every night is going to show really high HEE compared to one that runs on gas for a few miles a day/week/month.

I hate all the measures of EV/PHEV efficiency in common use. The only things we should be talking about are MPG, depleted battery start, and Miles / kWh, and never the twain shall meet.

My leafspy on my leaf told me I got 5.6 mi/kWh this morning. My PacHy takes about 10 kWh to go 30 miles. Clearly, the glorified golf cart is more efficient.
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Seems like that would only work if someone drove the same way as the person to whom they were comparing. A PacHy that only goes 20 miles a day and is recharged every night is going to show really high HEE compared to one that runs on gas for a few miles a day/week/month.

I hate all the measures of EV/PHEV efficiency in common use. The only things we should be talking about are MPG, depleted battery start, and Miles / kWh, and never the twain shall meet.
As you should and as it should be discussed.

Justifications
Abound.

Facts are short if they shorten the win.

For all but few, this electric is a hobby to be justified.
Few win at hobbies, but everyone says they win.
As you should and as it should be discussed.

Justifications
Abound.

Facts are short if they shorten the win.

For all but few, this electric is a hobby to be justified.
Few win at hobbies, but everyone says they win.
I appreciate your concession speech.
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From this day forward all reported fuel economy shall be accompanied by a photo of your 2 week drive history.
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From this day forward all reported fuel economy shall be accompanied by a photo of your 2 week drive history.
And a picture ID with you holding it to the camera. Blood sample not necessary.
Cost per mile.
Electric, gas, maintenance, charger install, ALL costs to own.

Cost
Per
Mile


Everything else is fluffing.
Cost per mile.
Electric, gas, maintenance, charger install, ALL costs to own.

Cost
Per
Mile


Everything else is fluffing.
That's true for the whole pie. I'm just looking for this particular slice of cobbler. Sometimes you don't want to eat the whole thing.
Fair enough.
Good luck getting the cook to not add secret ingredients to skew numbers.

So far, that's the problem in the thread.

So,
How about we make it a contest?
A picture of your dash disclosing what the dash says(equal as I can think of) over how many miles.

No rumor, no downhill only, just a screen shot.
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Fair enough.
Good luck getting the cook to not add secret ingredients to skew numbers.

So far, that's the problem in the thread.

So,
How about we make it a contest?
A picture of your dash disclosing what the dash says(equal as I can think of) over how many miles.

No rumor, no downhill only, just a screen shot.
Yeah that is the variable that really can define the mpg. If I understand it correctly, it's not user defined on the Economy screen whereas the trip odometer is user defined given that it can be reset.
Longer miles supports truth.
If it's a short run, disqualify.
1,000 miles at 42 mpg wins hands down over 99 mpg for 10 miles.

The justify/enhance people will ferret themselves out in the obviously purposeful skew.
Some folk will have to look that dash right in the eye and quit lying to themselves, potential Pac purchasers will have a base to peruse.

I think it would be a fun thread.
Someone mentioned LEAF.

isn't the leaf dash guage a gas mileage game?
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Yeah I was hoping for screenshots of the Hybrid Energy Economy display. That's the only way to work from the same yardstick.
I'm pretty sure that, even if you don't charge it, it doesn't handle regen correctly either, so if you have any significant hills it won't be correct anyway.
I'm pretty sure that, even if you don't charge it, it doesn't handle regen correctly either, so if you have any significant hills it won't be correct anyway.
So,
All but totally useless?
A visual fidget spinner?
So,
All but totally useless?
A visual fidget spinner?
Not necessarily. For relative changes in similar driving it's probably useful. It's for example very clear on ours that running with climate on quite dramatically lowers the mpge.

It's actually not very clear to me how to calculate a "live" MPGe, and I'm pretty good at math. Over a given interval you can take miles divided by ((gas in - gas out) + (battery in - battery out)) with appropriate multipliers, but that doesn't work "live".
During a 6000 mile trip, LA to NY and back, we averaged 26.8 with a cargo box on top and driving most of the time with 90 MPh.
In town we get 60 - 68 MPG, longer trips is 30 ish.

Cost of instal of "charger": $20 = one 50 AMP fuse from Home Depot + recycled high amp cable from discarded UPS unit from a datacenter + 20 AMP regular US plug.
Allows me to plug the factory mobile charger into 240 V. It reduces the charge time to 4h40min.

On a long trip, it's not that useful to plug in, if it's not convenient, since the battery only replaces one gallon of gas (30 miles).
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On gas only, I get right around 30mpg. Overall miles per gallon of gas I usually reset each fillup. That should be calculated by total miles driven divided by # of gallons burned. I usually get at least 1000 miles per tank which is about 72ish MPG, but I have gotten as much as 2200 miles in one tank of gas.

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Here's my info, @M0Par: I'm too lazy to post a photo, but my Average MPG (as shown on the dash) is currently ~85. I have been driving (according to my records and the hybrid page history graph on the radio) for the last 2-3 weeks 99-100% electric-only.

More background: The MPG listed above SHOULD be merely an MPGe calculation according to the EPA: https://en.wikipedia.org/wiki/Miles_per_gallon_gasoline_equivalent
So it means I can go 85 miles on 33.7 kWh of electrical energy. This matches the sticker for my van (84 MPGe), but is more than what the van estimates (33 miles on 100% battery which is 16 kWh). (85 miles * 16 kWh / 33.7 kWh = 40.4 miles of range) I can believe that on a full charge I can go 40 miles right now with moderate temperatures, moderate driving, and zero use of heater/AC. That makes sense to me. 84 MPGe sounds pretty good but by comparison, other electric vehicles are much better (Tesla vehicles are 120+ MPGe).

Now my .02: Where Chrysler made it "wrong" is trying to combine ICE/hybrid-mode MPG with electric-only MPGe. They use the same label (MPG) and seem to use a magic conversion (maybe 33.7 kWh = 1 gallon of gas) to combine all into one number: The Hybrid Energy page on the radio shows ICE usage in kWh and the dash efficiency page rating shows everything (including battery) in MPG. This might be convenient, but is misleading and leads people to just view everything as "magic numbers" that don't tell them anything about the efficiency of their vehicle. Unless you carefully drive 100% electric-only like I did for the past 2 weeks, you can't compare your electric-only mode to other vehicles with the current dash and radio info. And unless you drive in 100% ICE/hybrid mode, you can't compare your actual miles per gallon efficiency to other non-plugin vehicles. And the best you can do for calculating your cost per mile (gas and electric combined) is just do an average from one gas tank fill to the next, taking into account gallons, miles, and kWh from all the chargers you used.

I don't really know what would be better, but maybe a cost per mile would be more grounded in reality. Even a rough estimate of local electricity costs and gas prices would be enough to show a nice graph. Maybe the needle/circle graph (like a speedometer or the Energy Economy live chart you have in the photo) could show what you're currently getting, with two sections clearly marked: one for the "normal" ICE/hybrid range of values and one for electric-only. Or maybe just have them be two completely separate metrics with separate charts, stats, etc.
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