Show me your “AVG MPG”!!

[AXISJT]

It's above 28 a lot

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[rafaelsmith]

15-16mpg today
15-16mpg when it was new
15-16mpg with tail wind
15-16mpg with head wind
probably 15-16mpg thrown out the back of a C130

 

[Killroy Was Here]

If you believe the EVIC dash readout for your fuel mileage, you also most likely still believe in the tooth fairy ?‍, or at the very least suffer from a bad case of wishful thinking!?

The only way to really know is to calculate it yourself for each fill up. And that only applies if you have corrected the speedometer for any larger tires that you may have installed.

The readout on my truck is consistently inconsistent, & the majority of the time optimistic to say the least (sometimes as much as 3 MPG). It's only very rarely correct.

I think it has only given me an average on a tank that was less than what it actually got compared to hand calculated, maybe three times in the almost 11K miles that are on the truck now.

It's no wonder as finicky as these trucks are when it comes to filling the tank without belching gas down your fender, or the pumps kicking off early due to the tiny diameter fill pipe that crosses under the bed to the gas tank.
There is no way to consistently fill it to the same actual level every time.

This makes getting good accurate mileage calculations a moving target to say the least.

 

[Mac]

Leveled on 35s with 4.10 gears. Since it has gotten colder my mpg has dropped about 2mpg

 

[rafaelsmith]

If you believe the EVIC dash readout for your fuel mileage, you also most likely still believe in the tooth fairy ?‍, or at the very least suffer from a bad case of wishful thinking!?

The only way to really know is to calculate it yourself for each fill up. And that only applies if you have corrected the speedometer for any larger tires that you may have installed.

The readout on my truck is consistently inconsistent, & the majority of the time optimistic to say the least (sometimes as much as 3 MPG). It's only very rarely correct.

I think it has only given me an average on a tank that was less than what it actually got compared to hand calculated, maybe three times in the almost 11K miles that are on the truck now.

It's no wonder as finicky as these trucks are when it comes to filling the tank without belching gas down your fender, or the pumps kicking off early due to the tiny diameter fill pipe that crosses under the bed to the gas tank.
There is no way to consistently fill it to the same actual level every time.

This makes getting good accurate mileage calculations a moving target to say the least.

I don't even bother having the MPG display or indicators up on the screen. I "calculate" MPG a few times a year to get an idea but don't really worry about. Its a Jeep....if I cared the least beat about MPG I would not have gotten a Jeep.

 

[Gren71]

2in spacer lift
255/75/17 dueler a/t’s on stock steelies

20-22mpg average

12-15mpg towing my 5,000lbs(ish) TT

food for thought for folks looking to get MPG back. My “worth it to go back” thread

 

[ShadowsPapa]

I was consistently doing 22-23 and even a bit higher before I started adding weight and changed tires. Stock was easily 23 and some change when the roads were 55-60 mph.

Now with it sitting a little higher (about an inch or so), a couple hundred extra pounds on the front with skid plate, hitch, winch and steel bumper and A/T tires it's a lot less.

The big drop was in September when I was towing almost 5,000 pounds doing 65-67 mph. I only got 13.9 then.
Last fill my truck said about 18.5 mpg but the app said it was a touch over 20.
Sometimes the truck says a bit higher, sometimes it says a bit lower than reality.
Easily explained - you never ever get EXACTLY the same amount of fuel into your tank. The weather, how the truck sits on the pad next to the pump, and other factors can change it a lot. Over the course of many months though I find the truck is actually very close to reality - within a couple of tenths.

food for thought for folks looking to get MPG back. My “worth it to go back” thread

Tires matter. Even the dealer said that - he said expect a noticeable drop going to A/T tires from the stock tires. Makes sense - Jeep has to pass CAFE numbers.
If I was TRULY concerned about my mpg numbers and wanted them to go up to 22-23 again, I'd buy another set of wheels and summer tires and move the winch off the front of the truck to a receiver type mount and put my "plastic" bumper back on.

 

[Fishee]

Stock Willys, about 75% highway

 

[JPGlad21]

16-17, gas, stock Rubicon w/4,500 miles. A little worse than my '18 JLUR

 

[AZCooWhip]

Consistently 18+ ....all in. 37x13.5s, 3” and steel bumpers.

 

[vettred84]

Average this summer was around 16.7 now that it's been in the 40s it averages around 14.3. Running 35s on 2" lift.

lower mph because of winter mix gas additive.

 

[BUZZHEAD]

15 mph all day long
Hey its a JEEP not a honda

 

[Phishs]

15.2

 

[ShadowsPapa]

MPG low in September was when towing 5,000 pounds at 65 mph over the hills of I80 in eastern Iowa.

The low BEFORE that was when my wife was driving it home from Colorado Springs and she had the cruise set at about 80 much of the way. KS was also windy. So that accounts for the next lowest low.

Then there's a high of about 23 followed by a low - if I recall that's due to how much fuel I put in - in one case I stopped at the first nozzle stop, the next one I squeezed in more fuel so one has to average those two together.

Summer of course saw better mpg than cooler/colder months. Makes sense. Thicker oil, stiffer parts like differentials, cold hypoid lube on cold axle bearings, the engine itself less efficient.
Fuel economy tests show that, in city driving, a conventional gasoline car's gas mileage is roughly 15% lower at 20°F than it would be at 77°F. It can drop as much as 24% for short (3- to 4-mile) trips.

Studies show that winter blend fuels contain roughly 1.7% less energy than summer blends so there's a bit of a drop there (1.7% isn't nearly as bad as some guys claim, though.

FuelEconomy.gov says hybrid cars have it even worse. Hybrids can lose between 31 to 34 percent of their gas mileage during cold weather conditions.

Too many blame lower mpg on winter blend when it's not all that much. OTHER factors actually account for the lower mpg. So don't blame the lower mpg you see strictly on the gas! 1.7% is not much at all. IF you were doing 20 mpg, 1.7% of that (if you could so simplify it!) is a drop of only .34 mpg. Something not many people would even see. It's not quite that simple but stop blaming your 2-3 mpg drop on "winter gas". Your first few miles will suck because of things being cold.

• A vehicle’s engine may require more time to reach its optimal fuel-efficient temperature. This is why a vehicle performs even worse during shorter trips, because it spends a greater percentage of the trip at a less-than-optimal temperature.

• Cold weather also reduces a vehicle’s tire pressure, which can increase resistance.

• Gas pumps switch to winter grades of gasoline, which have slightly less energy per gallon than summer gas blends. (key word = slightly)

• A car’s warming features, including defrosters, fans, and heated seats, can draw more power from the car. (More load on alternator/charging system which takes HP to operate)

• Cold air is denser than warm air and puts more of an aerodynamic drag on the vehicle, especially when travelling at highway speeds. Air drag already increases exponentially as speed increases, add denser air coming at you - or you going at it.

 

[j.o.y.ride]

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