How accurate is the mpg on the dashboard?

 

It's accurate, but not precise. If you want your true MPG's, calculate it by hand.

Secondly, your thread title of "MPG" is extremely poor. It's not a thread title, it's an isolated word. I have revised your thread title to something with meaning to help readers of today and people that use the search function here on the ORG in the future. Thanks.

 

I guess the art of doing simple math on your own to answer your question doesn’t exist

 

Mine shows 24.4 for a long time (untouched), reality is 23.5 (manual calculation).

 

Man I don't know how you guys are getting mpg readings of 23 and higher. My car has consistently got around 21.3, on vacation I did see 22 but that was yrs ago and I don't drive Max on long trips anymore.

 

light foot, cruising, use of momentum and gravity, better gas, and properly inflated tires.
I also have engine braking set to OFF, if that makes a difference.

 

Crimson Black Maximas have the most drag and suck the most gas, don't you know?

 

Pretty good for a max with almost 200k!

 

You just reset it? Average is 72mph?

 

I was on the parkway. That was my average the whiole way 23-23.5 55 miles

 

"engine braking set to OFF"? what this means, and how you do it?

 

Check out this app:
https://play.google.com/store/apps/d....cvtz50.cvtz50

 

How much can i break my car playing with this app?

 

I am only averaging around 20.4.

 

I have a 2011 maxima with the borla cat back and my mpg says 19.0 on the dash but it’s incredibly wrong compared to the math. I know its running rich and i like to get on it sometimes but it shouldn’t be as low as it is. In town, with a 20 gallon tank, i get 220 miles on a tank. Not entirely sure how I’m getting 11mpg but on the interstate i get 20-22 mpg. The car only has 78k miles on it btw.

 

You must have a heavy foot on the gas. Especially on launches. I personally don't do it not for the gas mileage but to save the tranny 😁
PS: Clean your MAF and change the air filter

 

I really normally don’t though lol. Gas costs a lot an i’m in college and i’m really trying to save money and this car is not helping lol. I’ll clean my filter and maf to see if that helps. And yeah i know the tranny is like glass but I regularly service it. I’ve had the car since 50k miles and i’ve changed the tranny fluid once now.

Also does not help that i go to a college based around cars and everyone encourages driving like an idiot. Gotta love UNOH 😂

 

Do ya'll live in the mountains? Based on what I am seeing, you all have really poor highway mileage. As a matter of fact that is what I have been getting in the Covid era where I am not driving that much and driving in town stopping every 100 feet for stop signs (sigh) In the winter with AC off, mine is 30-33 (depending on the wind) for the same route in the Summer 27-29 ...although if the wind is good, it can be better) mahanddeem is correct. Keep your foot out of it, maintain your tires, change your oil and filters (air and oil) regularly and did I mention, keep your foot our of it? Also note, that just because everyone drives like an idiot, you don't have to. Be the better person, you don't have to be the first person to reach the next stop light! (Ok, I can admit it is a bit fun at times to feel yourself pressed back into the seat...but it does come at a cost and it doesn't have to be WOT!) If you really aren't driving start and stop, then you may have something really wrong and should get to a good mechanic.

 

I live in west virginia but my college is in ohio. I’ve mainly drove the car in the mountains but i’ve never felt pressed to drive like an idiot lol. Getting new tires soon because mine are getting old and i do full synthetic oil every 5k miles. I also run 89 gas too. I would run 93 but it’s expensive. Here in ohio its 2.50 a gallon and in WV its anywhere between a 2.70 and 2.90. I would drive with the a/c off but the humidity here is horrible in the summer, even with the windows down.

 

Lt. Leary you ever had timing chain or tensioner issues or have been serviced before? You ever used w40 oils?

 

Nope, live in the flat desert of the desert , I got the car in Oct of this year with 100k on the OD, I dont heavy foot it like I want to, just put in fresh plugs, air filter is clean, proper PSI in the tires, the car was checked out in Oct when I got it via a Nissan dealer, and the only issue that would cause less MPG was the plugs.

Got about 21.3 on this last tank, filled up with 70miles left, that was on the premium tank, went back to 87 on this tank.

 

no and no. Still standard m1 synthetic 5w30.

 

I have a 09 and mine says 23.5.

 

Took the car for a drive from Houston to Bandera Tx and once i returned back home my MPG was reading 50 MPH miles. The trip is roughly 460 miles

 

My 09 has been frozen on the MPH and MPG numbers for months, no matter how fast or far I travel. Any way to get it started again?