Getting poor gas mileage (Hybird)

[Mavster Mechanic]

The HVB will not be used much at all until it's heated to operating temps (over 40°F, preferably 72°F+). Will settle out around 100°F, I think.

Agree.
Though it warms up QUICK!

With a scanner:

Starting at 44°F my battery was 64°F in under 5 minutes.

And it was 102°F in about 50 minutes. (Then 50°F outside.)

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[HeyBales]

Agree.
Though it warms up QUICK!

With a scanner:

Starting at 44°F my battery was 64°F in under 5 minutes.

And it was 102°F in about 50 minutes. (Then 50°F outside.)

29 F this morning, by the time my almost immediate 2-3 min downhill was over with Normal mode regen coasting mostly, and I had to brake at the next light, it was warm enough for taking that full charge.
That's my faster route to work, to the highway when it's not jammed up.
The slower is more uphill 1/4 mile so ICE usage if it's warmed up enough, then mainly flat or slight downhill that needs power, mainly just EV - takes much longer that way to get to same temps.

 

[MakinDoForNow]

Agree.
Though it warms up QUICK!

With a scanner:

Starting at 44°F my battery was 64°F in under 5 minutes.

And it was 102°F in about 50 minutes. (Then 50°F outside.)

There is a heat exchanger capturing heat in the exhaust near the battery to warm the battery quicker. The battery will charge/discharge at a safe amp rate for each temp range to help warm battery also. In really hot weather the AC chill loop can be turned on to assist in battery cooling even if you are not running AC in cabin.

 

[Mavster Mechanic]

There is a heat exchanger capturing heat in the exhaust near the battery to warm the battery quicker. The battery will charge/discharge at a safe amp rate for each temp range to help warm battery also. In really hot weather the AC chill loop can be turned on to assist in battery cooling even if you are not running AC in cabin.

Actually, no A/C loop for the battery.
This was discussed on here before.
There were plans for that pre-production. It even made it into some early drawings. But it was not implemented into production trucks.

Heat exchanger cooling only. So the cooling loop will never be colder than ambient air.

 

[grandpopa'sMPGs]

I have noticed that when the temperature drops below 35 the truck auto switches from ECO to NORMAL drive mode.

 

[Mavster Mechanic]

I have noticed that when the temperature drops below 35 the truck auto switches from ECO to NORMAL drive mode.

During a drive or while parked?

 

[MakinDoForNow]

During a drive or while parked?

Don't think it would matter in the hybrid.

 

[Glen Baker LLC]

I have noticed that when the temperature drops below 35 the truck auto switches from ECO to NORMAL drive mode.

That's a new one for me. My 23 hybrid doesn't do that.
That happens while you're underway driving?

 

[HeyBales]

I have noticed that when the temperature drops below 35 the truck auto switches from ECO to NORMAL drive mode.

I'm going to assume you have a 25MY, by the date you joined the forum.
Because you don't have a tag line with yr/trim/model, nor your status shows year.

So you started truck - fast enough on the steering wheel OK button to keep the prior Drive mode in ECO, or punched the wheel arrow button to select it.

And after the dash display successfully showed ECO, you sat there and watched it switch back to Normal?
Or you started driving and it switched?

Were you changing radio stations perchance when it happened?

ETA - below 35 right now, going to test a 24MY XLT hybrid.

ETA:
As others have noted - no change. Either at start when the whole truck is below 35 F, nor after warmup when the air temp is still below 35.

 

[grandpopa'sMPGs]

I'm going to assume you have a 25MY, by the date you joined the forum.
Because you don't have a tag line with yr/trim/model, nor your status shows year.

So you started truck - fast enough on the steering wheel OK button to keep the prior Drive mode in ECO, or bunched the wheel arrow button to select it.

And after the dash display successfully showed ECO, you sat there and watched it switch back to Normal?
Or you started driving and it switched?

Were you changing radio stations perchance when it happened?

ETA - below 35 right now, going to test a 24MY XLT hybrid.

I have a 2024 xl hybrid. When I start the truck in the morning the engine runs. If it is below 35 0r maybe colder the truck is in normal mode instead of eco. I believe the truck does this to protect the battery. In warmer temperatures the truck stays in eco mode. My radio is on the only station I listen to. At 40F the battery drives the truck for the first mile before the engine kicks on. Below 35 The gas engine starts up. Overall the first mile is very low slope down hill.

 

[HeyBales]

I have a 2024 xl hybrid. When I start the truck in the morning the engine runs. If it is below 35 0r maybe colder the truck is in normal mode instead of eco. I believe the truck does this to protect the battery. In warmer temperatures the truck stays in eco mode. My radio is on the only station I listen to. At 40F the battery drives the truck for the first mile before the engine kicks on. Below 35 The gas engine starts up. Overall the first mile is very low slope down hill.

Ya - just tested on 24 XLT - stays in ECO mode just fine while parked during warmup, and starting to drive. 30 F.

So to your morning process again since Drive mode is not on the steering wheel.

You push the Drive mode button multiple times to get to Eco mode.
Confirmed on the dash screen visual with a leaf symbol.
And while sitting there it switches back to Normal mode?
Or you start driving, and it switches back?

Because no matter the mode - if it's cold, the truck will send only the amps it thinks the battery can handle, and actually only pull the amps it thinks it can supply, and either way, it's less than when warm. Mode doesn't matter.
That action will warm the battery up actually.

You must be pretty gentle on the Go pedal to manage that long in EV, unless you literally mean it's all downhill from the start.

 

[Mavster Mechanic]

Don't think it would matter in the hybrid.

My question completely matters because they all reset after you park with truck off.

 

[MarcoG]

Oh man, you gotta at least burn one tank off before you start counting mpg, and even that's still low a number to make a statistically valid statement.

Also, do your mpg math at the pump. The vehicle will only display an estimate, and a pretty bad one at that.

Burning a tank, of all the things mentioned, is bunk. Drove xcountry the minute l picked up my hybrid and it was no different from the first tank to the last. I had hybrids and PHEVs b4 and you just gotta hybrid-drive. Weather (cold) will definitely affect. I never use the heater, just seat warmer, unless l need defroster, if you want to hyper mpg. However, that burn a tank think is fiction.

 

[grandpopa'sMPGs]

I tried driving my hybrid Maverick the same way I drive My 2018 ICE chevy cruze and I got 15 MPGs less than when I drive my Maverick hybrid for maximum MPGs.

 

[HeyBales]

Burning a tank, of all the things mentioned, is bunk. Drove xcountry the minute l picked up my hybrid and it was no different from the first tank to the last. I had hybrids and PHEVs b4 and you just gotta hybrid-drive. Weather (cold) will definitely affect. I never use the heater, just seat warmer, unless l need defroster, if you want to hyper mpg. However, that burn a tank think is fiction.

It sounds like you misunderstood the reason why.
To get accurate MPG logging. That's what the response was to.

Because you have no idea how many miles were on truck when dealership filled it up - or did they fill it up?
And did they reset the trip computer from the test drives/transport miles when they filled it?
Doubtful.

So trying to get a decent MPG figure on that first tank that is meaningful - forget it.
Burn it and start on the next fillup for tracking purposes.

(unless like me you want to burn 1/4 a tank then fillup and start the logging!)

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