Getting Poor Gas Mileage

[shine]

Y'all getting such good mileage...

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[Nodak]

Y'all getting such good mileage...

thats good right now vs me. i dropped from 19.x to 16.1 in a span of 1 tank.

cold and remote starts eat into the mpg really hard in ND, but then again, if you live in ND winters, you shouldn't care about mpg in the winter time.

2018 tundra hit 4.492 mpg a tank
2023 tundra hit 6.913 mpg a tank
2025 4runner hit 16.089 a tank (and its only going to get worse from avg of 18.436 and max of 19.889 across the last 8 fill ups so far)

 

[John2112]

thats good right now vs me. i dropped from 19.x to 16.1 in a span of 1 tank.

cold and remote starts eat into the mpg really hard in ND, but then again, if you live in ND winters, you shouldn't care about mpg in the winter time.

2018 tundra hit 4.492 mpg a tank
2023 tundra hit 6.913 mpg a tank
2025 4runner hit 16.089 a tank (and its only going to get worse from avg of 18.436 and max of 19.889 across the last 8 fill ups so far)

I keep a logbook with my mileage and check it the old-fashioned way with math. It's surprising that the onboard computer is as much as three to five MPG off from actual mileage.

 

[Desmolicious]

I keep a logbook with my mileage and check it the old-fashioned way with math. It's surprising that the onboard computer is as much as three to five MPG off from actual mileage.

How do you know you are always filling it up the same way? There will be variations on fill ups depending on which gas station you use, if you always use the same pump at that gas station, if you fill until the pump clicks, then short pause before pumping till it clicks again to make sure it is brimmed etc.

In TFL’s consumption testing, they found the on board computer’s calculations to be very accurate.

 

[John2112]

How do you know you are always filling it up the same way? There will be variations on fill ups depending on which gas station you use, if you always use the same pump at that gas station, if you fill until the pump clicks, then short pause before pumping till it clicks again to make sure it is brimmed etc.

In TFL’s consumption testing, they found the on board computer’s calculations to be very accurate.

I've been filling up the same way for 45 years and checking gas mileage with pen and paper for the same amount of time. When the gas station pump shuts off I squeeze it again in case the pump pressure valve isn't working correctly. Even if there was a difference of a tiny bit of gas that wouldn't make an overall difference in gas mileage that really mattered. I saw that test you're talking about, and I've also seen reviews where people use Google maps to estimate their mileage. The only correct way to check gas mileage, when you get gas right down the mileage. When you fill up again subtract the current mileage from the previous and that's miles driven. Then divide that by the gallons used and you have your accurate gas mileage. I can almost guarantee you if you add it up this way you're going to see a difference between the onboard computers mileage and what you actually get. I've been keeping logs for gas mileage and maintenance in logbooks in every car since I got my license in 1976. It's also helpful when you go on vacation in a new vehicle when you note down the service station you used, I always use top tier stations, that way you can plan your next stop on your route. The only only in-car computer gas mileage reader I've ever had that was close to 100% accurate, my 2018 Porsche 911 turbo s. It was spot on 99% of the time. I have found that the 4Runner to be about 80% accurate. Now when you go and change the tire size and do heavy modifications the actual mileage is way off. Then you should get a speedometer app that shows mileage, those are fairly accurate and that'll give you a close mileage number .

 

[Chicane]

I keep a logbook with my mileage and check it the old-fashioned way with math. It's surprising that the onboard computer is as much as three to five MPG off from actual mileage.

I wish. After 4500 miles, my 4R shows 15.7 and the Fuelly app shows 15.8, so my on board computer is pretty accurate. I also see what my computer shows after each trip/drive and it all looks about right to me.

 

[Nodak]

i never go by the onboard vehicle mpg reading.

i use the fuelly app (acar) to record every fill up since gods know when.

then fuelly bought them out. so it was an easy transition to keep it locally (on the phone) and it syncs to fuelly after any changes to the phone app

i've been keeping track since my 2010 subie legacy and its all tracked in fuelly under my account.

my fuelly link is in my sig

 

[John2112]

I wish. After 4500 miles, my 4R shows 15.7 and the Fuelly app shows 15.8, so my on board computer is pretty accurate. I also see what my computer shows after each trip/drive and it all looks about right to me.

Sometimes you get lucky, these things typically aren't all that accurate cuz it's not like they have a meter showing how much gasoline is going in your vehicle.

 

[Dead Horse]

I've never looked at what the truck thinks I'm doing MPG-wise. I hand calc every tank.

And holy moly does it go down when it gets cold. I'm at 2,500ish miles and just had my worst tank yet at 18.x MPG

And while I have your attention, I want to also take this opportunity to express my acrimony towards whatever egghead shitwit came up with the 243 step process you have to go through to reset your trip meter when every vehicle since odometers were a thing, were reset with a single button. Thanks for making it worse you knobs. I think they hire actual lamp posts for their UI department.

 

[NotApplicable]

I've never looked at what the truck thinks I'm doing MPG-wise. I hand calc every tank.

And holy moly does it go down when it gets cold. I'm at 2,500ish miles and just had my worst tank yet at 18.x MPG

And while I have your attention, I want to also take this opportunity to express my acrimony towards whatever egghead shitwit came up with the 243 step process you have to go through to reset your trip meter when every vehicle since odometers were a thing, were reset with a single button. Thanks for making it worse you knobs. I think they hire actual lamp posts for their UI department.

I saw that digging around somewhere the other day and now can’t remember where it is! And where is the trip odometer…

 

[JoeYota4Runner]

I thought I would get close to 325 miles, but I only went 292 miles in my first tank. Is this normal or does it take a few fillups for the gas to get better.

 

[Jakethewhippet1]

yawn

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