Personal MPG record

[Aquineas]

Dash computer pegged at 29mpg while driving through New Mexico and Az after a fill-up, and stayed that way for 50ish miles, until I stopped at a rest stop for a bit. Prior to stopping the computer was projecting 550ish miles to a tank. I would have very much liked to get to that magic 500 mile to a tank mark. Sucks that I needed a bio break. After I rested for a bit the computer still projected that I could have almost hit 500 miles on a tank (it would have been like 492 miles), but I didn't want to chance it. I think it was a combination of a tail-wind, smooth roads, extremely light traffic. LKA is on btw which is how I could quickly snap the photo.

 

[Seejay]

Sweet. Kinda gets the moment--the car is so capable of transforming large distances into near nothing.

 

[Ragnar]

80mph and damn near 30 mpg...ain't that just insane!😜

 

[dareckibmw]

That's what you get...going downhill

 

[AustinTX]

Dash computer pegged at 29mpg while driving through New Mexico and Az after a fill-up, and stayed that way for 50ish miles, until I stopped at a rest stop for a bit. Prior to stopping the computer was projecting 550ish miles to a tank. I would have very much liked to get to that magic 500 mile to a tank mark. Sucks that I needed a bio break. After I rested for a bit the computer still projected that I could have almost hit 500 miles on a tank (it would have been like 492 miles), but I didn't want to chance it. I think it was a combination of a tail-wind, smooth roads, extremely light traffic. LKA is on btw which is how I could quickly snap the photo.

Something must be wrong with my car (or me?) - my best ever tank was 23 mpg on a drive to Houston from Austin, and back. Mostly rural state roads, 70 mph ... This 29 mpg is per the computer, so probably a real 27 mp, but that's still way above my average of 19.3 mpg over 12,000 miles.

Good for you!

 

[Aquineas]

Austintx, I get those same crappy MPG numbers between Houston and Austin. Something about a combination of the stops and the (loud) textured pavement, and I suspect the fuel formula in Texas, just kills the mpg on that drive.

I have never seen MPG like this before.

 

[Aquineas]

As for the downhill aspect, in that particular photo I am going downhill a bit. Overall though getting from Austin which has an elevation of about 500' to Sedona (which is about 4300') is a net increase. Now granted, the bulk of that increase happens between Austin and El Paso (3200'). But whatever elevation changes between Las Cruces and Sedona balance themselves out because the mileage was taken from somewhere near Las Cruces (3900') and Sedona.

 

[Aquineas]

Well, I inadvertently hit the 500 mile mark on the way home. I was trying to get to like a couple miles left but then the city that I was in sorta ran out and I was out in the boonies. Fortunately, there was enough reserve to get me to a petrol station:

Here's the fill-up after:

So just about 27.30 MPG, and the computer indicated 28mpg, so the computer isn't as far off as we all thought, less than 1 mpg.

 

[tomgen]

Just bought my ‘15 3.8 AWD Ultimate Friday and drove it home 500+ miles yesterday. Filled it 200 miles in and during the remaining 300 miles, averaged 29.3 on the computer while having the cruise set between 76 and 80. Very pleased!

 

[1FstYota]

how the hell are yall getting those numbers, I get at best 26mpg on the highway, and 16 if I'm lucky in the city.

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[2for1]

I just went on first road trip recently with 2015 3.8 2wd. I averaged 28 on the computer. Mostly 75-79 mph. I had tire air pressure set at 33. 2 people and trunk full.
If I was alone with trunk empty and tires bumped up to 35 I suspect that the mpg would go up. It's all about the variables. Also do you run with the ac on.

 

[Aquineas]

how the hell are yall getting those numbers, I get at best 26mpg on the highway, and 16 if I'm lucky in the city.

The numbers I posted are in no way normal for me. That's why I couldn't believe it. The conspiracy theorist in me wonders about the gasoline formula differences.

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I just went on first road trip recently with 2015 3.8 2wd. I averaged 28 on the computer. Mostly 75-79 mph. I had tire air pressure set at 33. 2 people and trunk full.
If I was alone with trunk empty and tires bumped up to 35 I suspect that the mpg would go up. It's all about the variables. Also do you run with the ac on.

lol I never run with the AC OFF.

 

[EdP]

Seeing the numbers on the photos they are going by the indicated mpg. On every one of my cars that gave that information, I found it to be optimistic compared to calculating from actual gas used at a fill up. Closest I ever came was 1 mpg, the worst was 5 mpg. I use the computer number as a guide and for comparison, not a true mpg rating.

 

[Aquineas]

The computer isn't as off as many would like to believe. I ran my car bone dry (could feel it starting to hesitate) and the photo above shows the fill-up immediately after. What the computer indicated and the calculated mpg are within 1mpg of each other. Unless the pump was wrong (which it could have been), which would mean the computer is the MOST accurate means of calculating MPG save physically measuring the fuel yourself.

 

[1FstYota]

I'm happy if I can get 28mpg on the highway, my gen 1 got 34 on the highway to Portland once, I thought I was in a hybrid.

 

[2for1]

The numbers I posted are in no way normal for me. That's why I couldn't believe it. The conspiracy theorist in me wonders about the gasoline formula differences.

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lol I never run with the AC OFF.

We have seasons in VA!

 

[Roc 5.0]

On trips to Annapolis(45 miles ea way) @ 65-70mph I've been averaging even 30 mpg with 32 mpg to Annapolis and 28 return. Trip to Pittsburg averaged 28 mpg with one stop for going 89 mph(no ticket!) and 30 mpg return( tank to tank). Much better than my old Mark 8 and better than my friends Mercs. Very satisfied. However I use 93 octane for max performance. Never tried 87 octane.