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My current real world fuel economy

23K views 40 replies 21 participants last post by  Trent Larson  
#1 ·
Here's a glimpse at what I've been getting for fuel economy. It's not amazing but it's quite a bit better than my last truck (2010 Ranger FX4, 4.0L V6) and I'm satisfied with the numbers. I think have a heavy foot so lots of you could probably do better than what I'm seeing but with 310hp and 281ftlbs and I really enjoy driving this truck. Nissan rates this truck at 12.8L/100km for city and 9.5L/100km for highway (combined=11.2) which is obviously a fair ways off from my numbers, but I expected that since I live in a mountain valley and I spend at least half my driving time going up hills (no, driving down the same hill doesn't balance it out to be the same as flat drive) which blows fuel economy all to hell in a hurry. I use my old Ranger as a comparative tool and where I'm seeing 16ish in the Frontier I was seeing about 19-20 in the Ranger.

Here's a spreadsheet of my fills/kilometers below but basically I'm averaging about 16.6L/100km (or 14.2MPG.) I've got one or two more fills that aren't loaded into the spreadsheet right now but they're right around the average. This is not good scientific method because I'm just logging the kilometers I just drove and the amount of fuel consumed to bring the tank back to full so there's at least a dozen spots where accuracy is being lost but I think it's a fair method to use as a truck owner that just wants some ballpark data..

The next couple of fills that I have to input will include more cold weather and snow driving (and doing doughnuts in the parking lot at work..) so there will be more idling and more use of 4WD to analyze and compare, this segment of the numbers is primarily "warm" (read: above freezing or only a few degrees below) weather and no 4WD use.

I missed 2-3 tanks when I first got the truck because it was a whirlwind week of picking it up and immediately packing for a weekend road trip but apart from that, this is a complete running log of every liter of fuel I've put in and every kilometer I've taken out.

I always track this info on all my vehicles but with this one I'm especially interested to see what happens to fuel economy when I put my 255/80/17's on with the lift kit in spring. I know it'll be a hit but I'm curious to quantify that..

Tank #DateFuel Quantity (L)Mileage (km)Economy (L/100Km)Overall Average EconomyEquivalent mpg
1Oct 6/2153.6322.116.6
2Oct 20/2167.0395.616.9
3Oct 30/2165.7415.315.8
4Nov 7/2142.7248.417.2
5Nov 16/2164.0377.417.0
6Nov 26/2156.5323.517.5
7Dec 3/2166.5438.915.216.614.2
 
#4 ·
I've only done a few runs and my truck is less than a month old so she's still in the break-in. Nonetheless, doing my calculations not the computer. I am seeing 1mpg above the EPA city rating. I recently took an all highway trip and was blown away that I was right at 23.6 mpg. Now this is driving on a regular highway at 60 miles per hour. Not on the internet running 80. I know that will definitely decrease the MPG. I think the sweet spot is around 55 to 60 miles per hour. Anyway.. I am more than happy with the MPG. Loving this truck!
 
#7 ·
After 3019 miles, computer says 23.9 mpg for me. That includes a couple fairly lengthy (300 miles+) highway trips where it was coming back in the 25-27 range at times. My best overall according to the factory is 27.9 on a trip. I'm in East Tennessee in a relatively small town with more mild ridges than big hills, so have to throw in that I'm coasting down those little ridges quite often which helps. Not a lot of traffic so stop and go traffic is very limited as well. Great truck!
 
#3 ·
Interesting! I am seeing a marked improvement over my '07 Frontier. The trucks are virtually identical spec, the only difference being the '07 was a long bed and my '22 is a short bed. Both are V6 4x4 automatic 4 door. My mileage in the 2007 truck was 17.1mpg, tracked over 204,994 miles, logged using a third party app based off mileage and fuel added at fill up. I was the only one who ever filled it up, so I am very confident in the accuracy of this number. My '22, while I don't have as many miles yet is reporting back 19.2mpg over 2,345 miles. This number is about 1mpg lower than what the trucks 'economy gauge' reports though. The truck isn't even broken in yet, and I haven't had the chance for any freeway trips, so I am excited to see how this improves.
 
#21 ·
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#36 ·
The reality is that the Frontier's mpg is very close to the same mpg as the Tacoma. It's just simple physics, it takes so much energy to push a certain size vehicle through the air that has a certain weight. The Tacoma and Frontier all very close in size and weight and I find my new Frontier's mpg matches the Tacoma very closely. Expect the EPA rating which is very close.
 
#37 ·
Ford and Toyota are sharing hybrid and EcoBoost patent technology. On the next generations I think they might have an advantage by offering both hybrid / EcoBoost models as well as EV. I've seen a photo of a EV Tacoma and Ford just announced that the ranger will also have EV. About the only way Nissan can come up with something to compete with that would be to put in their overseas diesel. Getting them to pass EPA is brutal with their elaborate emission systems.
 
#2 ·
I live in Central Florida (Flatland) and almost sea level. With my lift, tires etc.., I lost 2 mpg. I'm averaging 16 mpg now! I'm light-footed when I drive and 100% of my driving is mixed driving. I yet to take a long distance highway trip but I would expect 18 mpg. on a pure highway trip.
 
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#11 ·
Using OBD generated data:
When I take my foot off the gas going downhill I'll see over 100 "Instantaneous" MPGs...and then when I depress my clutch that number will shoot up to over 150 MPGs.
Also, the OBD reported 19.6 overall AVG MPGs is a good 2+ MPGs over my hand calculated avg which is closer to 17.5.
Hoping the fallacy is evident here, eh?
 
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#31 ·
Personally, I don't think one is going to get much better MPG's with local driving. Mainly because Nissan did nothing as far as reducing the weight. Its still a tank. In fact, even heavier then the outgoing. There is no magic bullet for bigger normally aspirated motors. The gain is marginal. But still better nevertheless. But nothing I would boast about. To get any significant gains one has to go with induction/smaller displacement. Diesel will definitely improve things but the cost of ownership/fuel pretty much defeat any gains. Ford just announced they will have a EV ranger on the next generation. Not sure if they will have a hybrid but I expect one. Definitely Toyota tacoma will be hybrid. Also seen a prototype EV tacoma as well. I would expect significant gains in MPG's on those platforms. Direct injection does marginally improve things but IMO, OEMS have hit a wall with larger normally aspirated motors.
 
#40 ·
Well, overall power does matter some. A stronger engine has to work less to do the same amount of work, i.e. uses less fuel. Then you've got the 9-speed auto which can increase the effect of more power and less fuel needed to turn the wheels. So I do think the new truck should see better MPG than the old truck.

Small displacement/forced induction engines use the same fuel at light loads because it takes the same amount of air and fuel to create the power. However, at higher loads small turbo engines use MORE fuel. Ford has been sued multiple times because their tiny turbo motors don't get anywhere near the advertised MPG in the real world. Smaller isn't better.

Spot on with the diesel ownership. I had a Jeep Gladiator EcoDiesel last year. In stock form it would do 33 MPG on the highway, mid-20s combined. But who keeps a Jeep stock? And with 34" tires that combined MPG fell to 20-21 from week to week. With $45 oil filters, $40 fuel filters, DEF, oil that was $9 per quart, etc...I wasn't saving money. The 300HP/530 lb. ft. of torque on an EPA legal tune was amazing. But it wasn't saving money.

I think PHEV is the way to go. Jeep's 4xe is perfect, BUT they need to find a way to get to 50 miles of EV range. That's the best of both worlds. Most people could drive on electricity much of the time for trips to the store, work, church, taking the kids to schools, etc. But you still have the ICE to fall back on for longer trips. And it'll also run in hybrid mode when you want. The fact that you can plug it in and drive to town on pure EV mode makes a huge difference in monthly costs of operation.
 
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#9 ·
Just going by the robot calculations. It makes me feel better about it. :D Nah, all kidding aside, my previous real world has always hung around 1 mile per gallon lower than the computer. That best number was on a flat, traffic free trip down a highway in Georgia farm country. I was as shocked to see the number as anyone.
 
#14 ·
I should add that my truck sports an above cab topper which doesn't help fuel economy at all, but does provide needed security from idiots as well as the elements.

Looking forward to hearing what the new Gen 2.5 & 3 get when traveling @80mph for 300+ miles.
Yeah/obviously, 55mph will maximize MPGs, but at the expense of 25 minutes of extra driving per hour compared to 80mph is just not a tradeoff I'll make when it comes to arriving at my long-ish distance destination a fair bit sooner when an interstate hwy is a viable choice.
 
#23 ·
I should add that my truck sports an above cab topper which doesn't help fuel economy at all, but does provide needed security from idiots as well as the elements.

Looking forward to hearing what the new Gen 2.5 & 3 get when traveling @80mph for 300+ miles.
Yeah/obviously, 55mph will maximize MPGs, but at the expense of 25 minutes of extra driving per hour compared to 80mph is just not a tradeoff I'll make when it comes to arriving at my long-ish distance destination a fair bit sooner when an interstate hwy is a viable choice.
Slower is not necessarily better if the engine is getting lugged down by the gearing, especially in areas with rolling hills.q

My Pathfinder with a 3.15 gear, when it was stock DRANK gas at 55-65 mph. 70-75 is where it liked to roll and got the best mileage there. 85 mph knocked about 1 mpg off it compared to 70. Now that it is tuned and moded it still likes 70-75 the best and 80-85 makes little difference. Cruise at the limiter for a while and it eats some gas.
 
#16 ·
1 liter per 100 kilometers equals 235.2 US MPG. You should have said so. 😁 I like to do my own math.

Screw the rest of the world. :ROFLMAO:
 
#20 ·
2021 gen 2.5 -

1300 miles plus all highway(70mph+) and very little around town over the holiday averaged 22mpg. half the fuel was wintertime Maine blend which typically kills your mpg. Had noticeably better economy on fuel from PA. truck was loaded with 3 adults and luggage/gifts so say 700lbs total. Also have a tri-fold tonneau cover.

before you ask i have no idea if the cover makes a difference...
 
#25 ·
Real-world fuel economy is hand calculated. Regardless, it is what it is. Fill up and go - rinse & repeat. YadaX3...

Gen 2 6-sp:
Honestly, cruising in 5th instead of 6th hadn't even occurred to me as far as real-world testing. To begin with, I'm so seldom on 55mph-65mph roads for any extended traveling. My best MPG to date was 21.7 on a Thanksgiving roundtrip using a rural hwy averaging 60-65 mph - using Winter blended gas, too.