since i first bought my car in december... i've only been getting about 300-330 mpt... and at first i thought it was just because it was new... breaking it in and whatnot (read that somewhere)... but now it's been about 8 months (15000 miles).. and i'm still getting that kind of low mileage.... i don't think i mash the pedal all that much.. jus occasionally... is there something wrong with my car????
i drive about 60/40 hwy/city
(i've never got over 340mpt)

 

"don't mash it that much"... I did a dumb little experiment and found that "mashing" it once loses about 10miles off that tank of gas... do you "mash it" 5 times per tank? There's 50 miles, and if you drive a lot of city (40% city for 15k miles is a lot) then you're right about where you should be... 330 miles/tank.

 

damn that's crazy.. that's only about 18 mpg...

 

Nothing is wrong with your car.
That's just about the same mileage I get. Do you drive with the A/C always on? Also, check the pressure in your tires. The way I see it, it's the price you pay for having the best 6 cylinder engine out there. It's a trade off - gas mileage for performance.

 

I get about 23-27mpg, never run it 'till the fuel light comes on, so I'm not sure what my absolute miles-per-tank is... I usually fill up when it's around 300 miles (somewhere around 1/4th)

 

i get about 290-320 before the fuel light comes on... i do drive with the ac on.. but only on the first dial..i dunno i'll try to see how much i can get out of my car... no mashing... no ac.. for one week...

 

i typically get anywhere between 325-360 with mostly city driving but it happens to be on the interstate but with all the traffic i sit in, im pretty sure that it equals out. most of the mods i have will help with mileage if i drive somewhat civil. i noticed my mileage go up a tad with lighter wheels but it could have been the weather or one of the other hundreds of things that affect mileage. also with the a/c i was told as long as the compressor is engaged, no matter at 1 or 4 that you will get the same mileage because the only thing that is working harder is the ac fan/motor.

 

When you say "per tank", how many gallons do you put on there?

I'm just wondering since if we based it on the full 18 gallons, 330miles only equates to about 18mpg.

However, most people here ends up putting about 14 gallons when the light goes on. Using that number as basis, 330miles comes out to 23.5mpg.

 

I had 360+ miles on my 2k1 SE and refilled with 15 gallons =24mpg. That's a good 80-85% HWY though, including a few "mashings"....

 

by tank, i mean all the way full... up until the DTE reads "---"... which is about 20 miles after the fuel light comes on i think....

 

--- usually means you still have about 2 gallons left. How many gallons did it take for you to fill it up again?

Either way, you're not as bad-off as it seems.

 

yeah... i suppose.. but i've read on here with people who get 400-450 mpt.. and that's WAY WAY more than i have ever gotten...

 

Doing highway I can easily get 400-420 miles out of a tank.

Mashing doesn't hurt that much. My day in day out MPG is something like 21 22MPG. All highway will push that to 23-24.

When my light goes on I have at least 60 miles left in the tank. I have done 90 miles with the light on, then put something like 17.7 gal in the 18 gal tank.

 

I mash the gas at least once per day and I average 23 mpg in the city.

 

I got 19mpg on my last tank, by far the crappiest I've ever got and I measure every tank.... Average 21 in town, maybe 23/24 highway

 

Yes, it does.

Again (don't people read before they post??), I did a very unscientific experiment. There are 5 lights on my way to work. I drove the exact same route at the exact same times and the only thing I did differently was (

a. one tank I mashed the gas and took it to 5500-6000 rpm, then brought it back down and shifted at less than 3k for all other gears. I did this for one day's drive (exactly 10 'mashes') then drove like (b) for the rest of the tank.

b. one tank I NEVER let it get above 3k rpm for the entire tank.

everything else was the exact same...I even drove to within a half gallon difference when I refilled.

For (a.) above I got about 320 miles/tank. For (b.) above I got about 420 miles/tank. So for every "mash" you lose about 10 miles off that tank.

 

Yeah, but you just gotta love those mashes!!!

 

The mpg on my 03 GLE is not that great, although I do quite a bit of city driving. Also, I agree with 2k2wannabe, the mashes (which I don't do often) drink fuel like crazy but you do get a thrilling acceleration out of them.

 

It also matters auto vs manual. The manual will give you about 2mpg more city

 

I think that it also matters on 2k-2k1 vs 2k2-2k3. It seems all you guys with gen5.a cars get around 21-23 mpg while us gen5.b doods get around 17-20 mpg. I get around 19-20 mpg in 2k3 auto. Just an observation.

 

VERY TRUE!!!

I drive the car, I mean DRIVE the car! Full redline shifts getting out into traffic on onramps (where there is sufficient space), full mash takeoffs from parking lots to get across 3 lanes of congested roads to get to the lanes traveling in the direction I want (and before anyone jumps on this as a flame point...WE ALL know what I mean about that 'gap' in traffic both ways), cruising at 70+ much of the way, etc., etc., etc. and RARELY get below 21mpg.

Not sure how well I could do if I really cared about a couple bucks for gas when I spent many thousands to enjoy a car.

 

If you think 10 mashes dumped 4 gallons of gas into your engine, you are crazy (100 miles, 25 mpg avg = 4 gallons). Everyone knows that mashing uses more gas, but hopefully no one thinks it does as much as you claim.

I mash both maximas all day long and almost every stop.

00 SE always gets around 340 miles per 15 gallons (23mpg)
95 GLE always gets around 400 miles per 16 gallons (25mpg)

 

Sooo, you're that crazy driver that almost ran me off the road the other day!

j/k J

 

if you think you're getting 25mpg when you mash the gas, you're crazy. 25mpg is an AVERAGE... there are times you're getting 45mpg and times you're getting 5mpg.

just a clue...when you mash the gas is NOT one of the 45mpg times.

 

**** I only get 20mpg, and I do about 50/50 highway/city. When I drove from WA down to CA recently, the best tank of gas was 30mpg, but then the next one was around 24mpg.

I hope you guys aren't calculating any of this using the car's computer. It's always too optimistic. I recommend calculating it manually to get an accurate figure...

 

Naw!!

In town where you are this would be suicidal...out on I10 from Katy on out it is a way of life, not just to get off the onramp, but to keep from getting rear ended by people doing 70+ in the right lane without moving over to allow for merging traffic!!

 

I actually find it pretty accurate if you subtract about 2MPG from what it tells you.

 

I don't think the difference is linear. When the computer reads 30 mpg, the actual mpg is probably around 27, and when it reads 20 mpg, the actual mpg may well be 18.5 instead.

 

and each of those is "about" two

 

I didn't think i had to explain it but apparently i do.

Here's what you said:
a = 320 miles/tank with 10 mashes
b = 420 miles/tank with 0 mashes

That equals 100 mile difference per tank (b minus a).
Since maximas are rated 21-28 mpg, i took a mid number (25) as an average and divided it into 100, that is 4 gallons. But if you want to say that mashing is not a 45mpg time but a 10mpg time. Then by your expiriment you just dumped 10 gallons of gas into the engine for 10 mashes.

by your expirement you could also say
"driving roughly 30 blocks and mashing each light would result in an empty tank"
by the calculation 10 miles per mash times 30 mashes = 300 miles lost on the tank.

My guess, and i dont claim to be an expert, is that 10 mashes (0-60 full throttle) would use somewhere around half a gallon. Again, i'm not saying mashing doesnt affect gas mileage because it certainly does.

 

I get around 21 MPG city, 26 MPG HWY. 27.5 MPG is my best so far. If one drove ultra lamely, I suppose 30 MPG should be doable with a stick.

 

Well guys the 3.5's arent fuel friendly as I like to say, the 3.0's are much better on the gas. I usually get about 290-330 on a tank in both the 03 and the 350. I know when I mash them I can see the fuel hand move in the 3.5's whereas in my old 01 and 97 I didnt and its not only Maxima its G35's 3.5 Alti's and other 350's those owners are complaining as well about the low/poor mileage.

 

Seeing as to how I've beaten a couple of Mustang GT in my auto Max and still have a "decent" mileage, I'm not complaining.
It's the price I pay to drive one of the best engines around

 

that's my experiment and I'm sticking to it.

I'm going to guess there's more slop than you're allowing in your 'calculation.' I had a car with a mileage calculator that updated every 5 seconds, and over the course of a tank was very accurate. On a hard launch it wasn't uncommon to see 4 or 5 mpg all the way from 0 to 60-ish, and that was on a 4-cylinder. I can't imagine our engine would do any better.

I regularly get about 28mpg, that means doing my experiment I wasted a little more than 3 gallons. I did the runs, I know what I saw.

 

I get in between 15-16 MPG...have no idea whats wrong with the car