2015 4Runner Fuel economy?

[JeremyB]

Can you explain what "actual" is? It's my understanding that all mpg measurements are estimates, with the dash/trip display being the most accurate on a stock vehicle.

When It Comes to Mileage, Cars Tell the Truth | Final Inspection

Not necessarily true.

The ECU calculates MASS of fuel injected. It then uses a density conversion to calculate VOLUME of fuel used for your dash display. Density will vary with temperature and brand, among other things. The actual volume of fuel used it how much you put into the tank via the gas pump.

Long term, using the pump volume and odometer mileage is the standard for vehicle fuel economy. Within a tank, I'd say the dash output is an excellent estimate for fuel used when comparing different routes or speeds. Comparing tanks back-to-back, both the dash and pump have errors. The dash can't compensate for the fuel density change and the pump won't always refill to the same level.

For the last 12 tanks on my Prius v (waifu drives the 4Runner), the dash mpg has averaged 6% higher than the pump mpg. Min of 3.2% higher, max of 9.5% higher.

 

[radicalwillie]

Can you explain what "actual" is?

I was speaking of miles driven divided by gallons filled at the pump. Yes, this method is fraught with potential for error too, but I still trust the accuracy of this method over the trip computer... right or wrong.

 

[Blitzkrieg]

I was speaking of miles driven divided by gallons filled at the pump. Yes, this method is fraught with potential for error too, but I still trust the accuracy of this method over the trip computer... right or wrong.

100% correct. Follow the same procedure every time and you will get a very accurate MPG number.

1) Record mileage
2) Insert gas nozzle with auto fill on
3) Let it go until it shuts off
4) Use the gas up
5) Repeat steps 1-3
6) Divide miles since step 1 by gallons to fill up in step 3. That's your MPG and is quite accurate.

 

[USKTog]

I get 20 doing 70 and 22 doing 55-60. I have seen a few 23s and above where the traffic is consistent around 50 or on roads with a low speed limit.

City I get 16 to 18 but I drive easier than many. Like the quote said - around the sticker values.

Not bad for a 2.5 ton vehicle with the aerodynamics of a brick.

Best I have achieved is 27.02, filling up in Del Norte, CO and returning to Denver, up CO-114 to US-285, keeping the RPM's up in the 4000 range for the passes, and doing 65'ish (might have done +5 over...lol)

 

[jreask]

Best I have achieved is 27.02, filling up in Del Norte, CO and returning to Denver, up CO-114 to US-285, keeping the RPM's up in the 4000 range for the passes, and doing 65'ish (might have done +5 over...lol)

I call total BS.

 

[USKTog]

I call total BS.

Call it what you want, but it did happen, and it was 27.03...(06 Dec 2014):

 

[raynyc]

Call it what you want, but it did happen, and it was 27.03...(06 Dec 2014):
View attachment 150332

What app is that

 

[JayceeP]

What app is that

Looks like Road Trip.

 

[Landy]

Howdy!
New to the forum!
Just curious about 4 Runner's fuel economy on the highway? Main purpose of the vehicle is to travel to our cabin in WI. Some snowy roads in between and guess a 4 Runner could tackle it all! I know you don't buy a 4 Runner for fuel economy but if I got 18-20 on the highway i'd be happy!
THANKS!

I'm in the middle of a cross country trip and I've been getting just short of 20mpg per tank even going 80-85mph. This is all fairly flat terrain with light winds. Nowadays most roadways and speeds of traffic are not conducive to good fuel economy.

 

[raynyc]

Looks like Road Trip.

thanks ,
i just bought . hopefully it does multiple vehicles .

 

[JayceeP]

thanks ,
i just bought . hopefully it does multiple vehicles .

There is a free version but less functional. Probably better you paid because now your stats can be shared on multiple devices and I believe you can have multiple vehicles too. I really like the app.

 

[USKTog]

What app is that

Road Trip

 

[etc.]

I call total BS.

Me too.

Best I got was 23.8mpg. And that was trying my best to conserve gas.

 

[Blitzkrieg]

Yeah, the only way any 4Runner would get 27.x MPG is free falling from a plane.

Not sure what you had going on there, but I can guaran-phucking-tee you that your 4Runner was not and never will get anything over 24 MPG on the best of best days, hooked to a semi's bumper. ;-)

 

[shadowmaker]

The octane rating has nothing to do with the fuel economy. Nothing.

If it is "enhanced" with either ethanol or MTBE (like they do here in Denver in the winter) the fuel economy will go down because the fuel has less energy content than straight unmodified gasoline.

I get a kick out of the whole octane thing. I had a friend that had a Corolla and he ran premium because he firmly believed his motor made more power, got better mileage and would last longer because of it.

I explained the truth to him once and then gave up.

The only way I can see premium gas giving better gas mileage is bc 'supposedly' it has less ethanol. As far as making more horsepower, only if you car is tuned to take advantage of it.

 

[ic0517]

I got the idea of the fill up from some one else a long time ago, starting with the 4Runner, I use a spread sheet in Google Drive.

You want to get really stupid, you can take a picture of the odometer and the gas pump with your smart phone. What would be really cool is if some app could look at the picture and shove the stuff into a spreadsheet for you. A long time ago I worked on character recognition software, I am sure it has gotten better since then. I just don't got the time for that stuff any more.

 

[williamlv282]

I use 91 octane and I drive over 50% highway. I get just over 17mpg on average.

 

[NoDak]

hehe, I use 89 with ethanol. I cant see the justification (imo) for .20 to .40 cents more for 2 more octane w/o ethanol.

personally I don't even mentally keep track of the mpg, I just fill it, jot the numbers down and go.

its a gee whiz number.

 

[jrandom]

Best I have achieved is 27.02, filling up in Del Norte, CO and returning to Denver, up CO-114 to US-285, keeping the RPM's up in the 4000 range for the passes, and doing 65'ish (might have done +5 over...lol)

I call total BS.

Me too.
Best I got was 23.8mpg. And that was trying my best to conserve gas.

Anomaly. It is totally possible to have a tail wind for 230 miles that would give you a substantial increase in mileage, just sayin

 

[Tom351]

Also, Del Norte, CO is elevation 7884ft and Denver is at 5280ft....

I still think that 27MPG is unbelievable...but the elevation change would definitely cause an increase of a few MPG on a one way measurement.