36mpg in mixed. Don't know how people get 40mpg.

[Staves]

Got my SE hybrid with 4600 miles. Have put 1300 miles on it so far.  Last tank did calculated by hand and averaged 36mpg.  Haven't calculated before that.  I never go by what the computer says as it's always optimistic/wrong.  Always drive in Eco mode on the freeway and even side roads.  I don't drive for fuel economy.  I go around slower drivers etc but I think you'd have to drive this thing like a complete Grandma to get in the 40s.  

I'm driving the current tank in Eco only on the hwy and see how much worse the mpg is, since the car doesn't feel as emasculated in normal mode on the side streets.  36mpg is still good though on regular gas but I can't see how I would ever do much better.

[2014FordFusionSE]

There are a few threads on this topic. It's been well beaten to death ?

(See: https://fordfusionhybridforum.com/forum/7-fuel-mileage/)

 

I used to get 42 mpg with the OEM Michelin LRR tires. Once I switched to Michelin Sport tires, the average dropped to 38 mpg.

That's the biggest factor IMO.

(I drive normally)

 

Happy New Year!

Edited January 1, 2022 by 2014FordFusionSE
forgot the fuel mileage forum link

[Staves]

I do have the OEM tires. But nowhere near 42mpg hand calculated. Happy New Year.

Edited January 2, 2022 by Staves

[mwr]

I've had my 2015 FFH for seven years and 90K miles. For my normal suburban driving I get about 47 mpg displayed (about 45 calculated). That's a combination of city/town streets and 55-60 mph freeway, usually moderate temperature. Less mpg for higher speed freeway driving, more mpg for mostly back-road 45 mph driving. Overall displayed mpg (90K miles) is 46, meaning about 44 mpg if I had calculated it. Always OEM Michelin Energy Saver A/S (P225/50R17 93V).

[Staves]

I will say I have never gone under 65mph on the freeways. Speed limit is 65 and going anything less feels like you're just going to get run over. That may have something to do with it. Also my last tank I was taking a neighbor to/from work for about 10 days and that was mostly freeway at 75mph.  That's ended and I have no commute so mpg may improve this tank.

[Cobra348]

Assuming the computer is generous in calcs is correct.  I use gas receipts (have since my '15) and found sometimes 3+ MPG difference compared to trip meter.  I reset trip meter every fill.

 

I use ECO in all driving situations and it works fairly well - altho emasculated vs normal cruise is a good comparison.  Sweet spot for highway is somewhere between 53 and 58 in my travels.  The fact you are doing a higher limit will affect mileage.  If you are in a Wintery area that gets snow, etc, the driving conditions will also affect your mileage.  My displayed mixed went from 44+ and currently is 38.9 - snow tires, Winter gas blend, snow.

 

Sounds like you're doing all the right things.  Might want to reset the lifetime MPG to ensure a clean slate.  That's done by holding the right hand OK button until it's reset.

[mwr]

> If you are in a Wintery area that gets snow, etc, <

Rain/wet pavement will also lower mileage.

[Staves]

It was off/on rainy for much of the 10 days or so that I drove on the freeway.  I'm in southern CA so no real wintery weather. I do reset the trip meter after every fill up. For giggles, I'm driving in Eco mode only on the freeways for this tank just to see what my mpg will be overall.  Would kinda suck to average 35mpg overall as I'm guessing I could do get close that in a new Civic, lol.

[Cobra348]

Do more than 1 tank.  I tested both modes way back and drove over 2000 miles on each before trying to make a judgement.

[MisterG]

Have you checked your PSI in your tires?    Many members have posted that is a huge factor as well.    I live in a wintry area, so my mileage drops in the winter months, but shoots right back up in the spring, summer, and fall.    Also, as others have indicated, the tires themselves can impact the mileage, but if you are using the OEM tire, then you should be getting better mileage.    It seems for me that the tipping point on the mileage is around 75mph.    Going over that seems to drag the economy down.

[Staves]

11 hours ago, MisterG said:

Have you checked your PSI in your tires?    

Yes, they were 33/34.  I set them all to 35 last week.

[wadroc]

MY 2010 FORD FUSION HYBRID GET ABOUT 38 MPG ON HWY.. BUT AVE 93 MPG IN THE CITY...  YOU CAN DO IT IF YOU KNOW HOW TO DRIVE WITH HYBRID MODE..

[mwr]

6 hours ago, wadroc said:

MY 2010 FORD FUSION HYBRID GET ABOUT 38 MPG ON HWY.. BUT AVE 93 MPG IN THE CITY...  YOU CAN DO IT IF YOU KNOW HOW TO DRIVE WITH HYBRID MODE..

All that 93 mpg means is that you started that very short 5 mile trip with the HVB at a high charge and ended with it at a low charge.

[Staves]

Just filled up again.  Topped off the tank.  Got in 12 gallons for 435 miles. That's 36.25mpg average last tank.  Computer said my average for 435 miles was 40.9, lol.

Edited January 15, 2022 by Staves

[Staves]

On 1/11/2022 at 10:08 PM, wadroc said:

MY 2010 FORD FUSION HYBRID GET ABOUT 38 MPG ON HWY.. BUT AVE 93 MPG IN THE CITY...  YOU CAN DO IT IF YOU KNOW HOW TO DRIVE WITH HYBRID MODE..

 

LOL.  That means nothing.  I get those 99mpg summaries on short drives too.  Hand calculated average on fill ups are all that matter.

Edited January 15, 2022 by Staves

[Staves]

Filled up tonight. Computer said 75mi range. Got in 11.1 gallons after a couple clicks of the pump into 473 mi, which is 42mpg. Don’t ask me why I did so much better this tank. Have done a little rideshare driving but not tons. Have no idea. Have been in eco mode 100% of the time.  Maybe that’s it.  

[MeeLee]

Used to get 45-48MPG on my 2019 model, with the stock tires.
Hot (80 to 90+F) weather, sea level.
They were $210/tire, and were pretty loud.
Went with cheaper bridgestone tires. Their max PSI is rated at 45PSI. Got some lousy 38-41MPG on them, so I put 40PSI in them cold.
On a hot day on a long highway ride, they don't get more than 44PSI, most of the time hovering between 42 and 43PSI.

 

I later bought some taiwanese tires, as the chinese tires lasted only 10k miles front, and 15k miles rear, and noticed they were rated for 50PSI. So I put 45PSI in em. Drops down to 42 on cold nights.

I now get between 42 and 44MPG.

 

Also, I feel that for acceleration, normal mode is best.
For braking and highway cruising (55+ MPH), eco mode is best.

The optimal speed lies between 55 and 60MPH. If you're lucky you can keep the engine running charging the battery. After the battery is full, you should be able to get ~55MPG out of the engine (the white bar almost hitting 60MPG).

On the Hyundai Elantra 2.0, that same engine (2.0 Atkinson) nets 75MPG at those speeds. 
It doesn't have a hybrid system to charge, so it does a bit better on gas.

 

Below 45MPH you can run the engine, charge the battery, and then cruise on electric, for higher MPG.
In such zones you should be able to achieve 50MPG easily.

Turns out high MPG is a combination of driving style and tires.

[Staves]

40psi cold? I usually just put the recommended cold psi recommended or maybe a coupe more. 35 is recommended so I put 36-37. Lately driving almost all in town and averaging about 38mpg. 

[MeeLee]

3 hours ago, Staves said:

40psi cold? I usually just put the recommended cold psi recommended or maybe a coupe more. 35 is recommended so I put 36-37. Lately driving almost all in town and averaging about 38mpg. 

Really depends on how much the temperature variation is.
All you have to do, is make sure the PSI rating never reaches the tire's max rating during a hot day, on a long highway ride.
Stay at least 1PSI below.
If the max rating is 45PSI, and after you park the car on a cold morning, the tires could very easily read 38PSI.
Also depends on the weather. When rain is coming, the PSI readout goes down. When it's sunny, your tires can just seem to gain 2 PSI easily.

 

With the OEM tires, which are mostly rubber, you can do with 35-40PSI.
But if the tires are replaced, especially with cheaper variants, the MPG rating drops, and you'll have to compensate with higher PSI.

Chinese tires are notorious for having a high silicon, and a low rubber content.
Those tires can usually handle 50PSI just fine, and have amazing grip. They also handle heat better/
But their MPG numbers suck, and they usually last no more than 10-15k miles. 
They also insulate the temperatures, so the air in the tire tends to get hotter, and the tires pressure can at times, increase by over 4PSI hot vs cold; this vs usually only 2PSI on high quality rubber tires.

I've found some Taiwanese, and Indian tires, use less silicon, more rubber, and last a bit longer,

but the highest graded Japanese and US tires, have a very high rubber content.
Their grip is usually less (for touring tires), but their durability is very high (~30-50k miles minimum, 75k miles maximum).

Edited March 19, 2022 by MeeLee

[billford]

I would calculate fuel mileage using a 3 month average instead of 1 tank.  

Sometimes the car sits on a slight angle and you can get more or less fuel in the tank that greatly affects the calculation. 

 

I use the android app called mycars that makes it easy to average out. 

[Cobra348]

On 3/19/2022 at 12:57 AM, Staves said:

40psi cold? I usually just put the recommended cold psi recommended or maybe a coupe more. 35 is recommended so I put 36-37. Lately driving almost all in town and averaging about 38mpg. 

I run 40 psi cold ....  did on the OEM tires and do on the snows I use.  I'm lazy and don't want to keep checking pressure so I can usually go 2-3 months when at 40.  This pressure is well below the MFGR max and runs just as well. 

 

The OEM tires finally ran out of tread so a new set will be installed Mar 24 - Goodyear ComfortDrive.  Supposedly as good as the Michelins but this I gotta see - and there is a 30-day satisfaction period.

 

Edited March 20, 2022 by Cobra348

[Staves]

Last tank averaged around 40.  Averaging around 1k mi/month.  Got oil change and tire rotation today. Have to say, not many complaints about this car at all. It’s a workhorse and so far loving it.