Mileage per tank dwindling fast. Thoughts?
#1
Mileage per tank dwindling fast. Thoughts?
Well, I was managing to get about 420-450 miles per tank (more on long trips) with my regular city driving. Well, I've not changed my driving habits, and I've only been getting a little over 325 per tank. The car has about 59,000 miles on it now. It's likely time for a tune-up...I keep putting that off since I do that stuff myself. Fuel filter? Any other ideas?
#8
Originally Posted by MaxFan
So 60K mark is coming ! The fuel filter is in the tank, so forget about it. But make sure you flush the transmission, the radiator and change the air filter.
#9
Originally Posted by MaxFan
So 60K mark is coming ! The fuel filter is in the tank, so forget about it. But make sure you flush the transmission, the radiator and change the air filter.
Originally Posted by RHMax
That's pretty good, 400+ in town. The 60k service should help. When was the last time you changed the air filter?
Originally Posted by !PrjctMax!
holly s***! 450?!?!?! I'm lucky to get 350 ![Rotz](https://maxima.org/forums/images/smilies/rotz.gif)
![Rotz](https://maxima.org/forums/images/smilies/rotz.gif)
![Big Grin](https://maxima.org/forums/images/smilies/biggrin.gif)
Originally Posted by NmexMAX
Winter fuel? ![got me](https://maxima.org/forums/images/smilies/ne_nau.gif)
![got me](https://maxima.org/forums/images/smilies/ne_nau.gif)
![Tear](https://maxima.org/forums/images/smilies/tear.gif)
#10
Thats some impressive gas mileage. I only get around 26 mpg on the hwy (under 70mph). About 18-20 in the city. And I have never seen the remaining mileage display more than 405 maybe. I think mine has already dwindled compared to some of you.
#18
Originally Posted by tehaviator
Just put in my very first tank of gas. Fuel light came on at 15 gallons. If I remember correctly, the tank is 20 gallons. I had driven 260 miles or so. Computer said 18.6mpg. Coming from a 7 series BMW, I expected better.
#20
Well, I got the car back from the shop. Their troubleshooting wasn't any better than mine. But I did learn two things:
[1] Clean your air filter often. I'm not sure if this is discussed in other threads already, but when I first got my car, I checked that and it was filthy. So I bought I new one (paper filter) and installed it. About a month after that, I bought a K&N drop-in. Well, that was about a month and a half ago. Mechanic said it was filthy. What gives? Its like a vacuum cleaner for the street or something.
[2] I got the transmission flush. My car shifts completely different now...in a good way. I highly recommend that, and so does Nissan every 30,000 miles, I think.
Just some thoughts I wanted to throw out there...prolly stuff you guys already know.
They are also going to replace my CD player (no questions asked). I just told them it was skipping, and the service advisor's first response was basically "when that happens, we just replace the whole thing". They also installed my Brembo rotors for about $60, which is nice since I had horribly warped OEMs.
I plan on changing spark plugs this weekend. Any recommendations? I suppose I could do a search too. Ok...I think I'm done.
[1] Clean your air filter often. I'm not sure if this is discussed in other threads already, but when I first got my car, I checked that and it was filthy. So I bought I new one (paper filter) and installed it. About a month after that, I bought a K&N drop-in. Well, that was about a month and a half ago. Mechanic said it was filthy. What gives? Its like a vacuum cleaner for the street or something.
[2] I got the transmission flush. My car shifts completely different now...in a good way. I highly recommend that, and so does Nissan every 30,000 miles, I think.
Just some thoughts I wanted to throw out there...prolly stuff you guys already know.
They are also going to replace my CD player (no questions asked). I just told them it was skipping, and the service advisor's first response was basically "when that happens, we just replace the whole thing". They also installed my Brembo rotors for about $60, which is nice since I had horribly warped OEMs.
I plan on changing spark plugs this weekend. Any recommendations? I suppose I could do a search too. Ok...I think I'm done.
#22
Originally Posted by Kross
So, how's the mileage looking now? (After you got it back from the shop)
#24
Originally Posted by DRod
Have yet to find out. They didn't really do a whole lot to fix that. So far, so good though. At the first tick mark, I'm at 131 miles. That's about right. Once I clean the injectors, I'll have a better idea. I got an overdue (which never happens) oil change too. I was 5,500 over.
![NoNo](https://maxima.org/forums/images/smilies/nono.gif)
#25
Originally Posted by tehaviator
Just put in my very first tank of gas. Fuel light came on at 15 gallons. If I remember correctly, the tank is 20 gallons. I had driven 260 miles or so. Computer said 18.6mpg. Coming from a 7 series BMW, I expected better.
First of all, you should know that since this is your first fill up, your engine is obviously not broken in yet. For the first 3000 miles or so you will be getting poor mileage and as you engine starts to wear and break in, it will get better. As the engine breaks in, the pistons and piston walls start to fit better together as you put more miles on it and after a while, your engine will be giving you better mileage.
Second of all, the reason your fuel light came on at about 15 gallons is because our cars have about 4 gallons that are kept as reserve fuel. This way when people keep ignoring their gas light, they still have fuel to get around to a gas station.
Third of all, RELAX! Your car is fine and dandy!!! lol
#26
Originally Posted by Killah Kane
First of all, you should know that since this is your first fill up, your engine is obviously not broken in yet. For the first 3000 miles or so you will be getting poor mileage and as you engine starts to wear and break in, it will get better. As the engine breaks in, the pistons and piston walls start to fit better together as you put more miles on it and after a while, your engine will be giving you better mileage.
Second of all, the reason your fuel light came on at about 15 gallons is because our cars have about 4 gallons that are kept as reserve fuel. This way when people keep ignoring their gas light, they still have fuel to get around to a gas station.
Third of all, RELAX! Your car is fine and dandy!!! lol
Second of all, the reason your fuel light came on at about 15 gallons is because our cars have about 4 gallons that are kept as reserve fuel. This way when people keep ignoring their gas light, they still have fuel to get around to a gas station.
Third of all, RELAX! Your car is fine and dandy!!! lol
#27
Originally Posted by joe_mo1971
I have yet to get over 320 with my 2007. Even during my initial breakin period when I was taking it easy on the acceleration. Any 07 owners out there experiencing the same thing? I thought the CVT was supposed to help with mileage.
How many miles on her? Mine was dismal till 4,500, then kept improving steadily until recently (now just over 10K). In Charlotte's miserable traffic she now averages about 21mpg, which is about 1 mpg better than my '03 with same engine & same general driving conditions.
If your doing 320 miles on a typical 15-16 gallon fill-up, that's not too bad, especially if you have fewer miles on yours than I have on mine.
#28
Originally Posted by MaxFan
So 60K mark is coming ! The fuel filter is in the tank, so forget about it. . .
http://forums.maxima.org/showthread.php?t=260358
Because there are other generations of Maximas covered, you need to be certain that you are dealing with the 6th Gen when reading the advice here. There is also a link with pictures. Check it all out.
On another question raised on this thread: Winter gasoline has a higher vapor pressure to allow it to better vaporize in cold weather. The blending component that gives a higher vapor pressure (butane) has less energy than other gasoline blending components, and so your winter mileage tends to be less than your summer mileage. You may also be in a location that just started requiring the blending of 10% ethanol in all gasolines. Ethanol has less energy than gasoline, and using that blend will reduce your gas mileage, too.
Before you change your spark plugs early (before about 100 K miles), I would run some Techron through the fuel system (follow instructions on the bottle). The need to more frequently change spark plugs has been reduced substantially due to better gasoline (much lower sulfur content) along with the use of a good fuel system cleaner like Techron.
#29
Originally Posted by Killah Kane
First of all, you should know that since this is your first fill up, your engine is obviously not broken in yet. For the first 3000 miles or so you will be getting poor mileage and as you engine starts to wear and break in, it will get better. As the engine breaks in, the pistons and piston walls start to fit better together as you put more miles on it and after a while, your engine will be giving you better mileage.
Second of all, the reason your fuel light came on at about 15 gallons is because our cars have about 4 gallons that are kept as reserve fuel. This way when people keep ignoring their gas light, they still have fuel to get around to a gas station.
Third of all, RELAX! Your car is fine and dandy!!! lol
Second of all, the reason your fuel light came on at about 15 gallons is because our cars have about 4 gallons that are kept as reserve fuel. This way when people keep ignoring their gas light, they still have fuel to get around to a gas station.
Third of all, RELAX! Your car is fine and dandy!!! lol
![Smilie](https://maxima.org/forums/images/smilies/smile.gif)
I kinda figured it had something to do with the break-in period. I just hit 500 on the highway today
![Smilie](https://maxima.org/forums/images/smilies/smile.gif)
![Frown](https://maxima.org/forums/images/smilies/frown.gif)
![Smilie](https://maxima.org/forums/images/smilies/smile.gif)
#30
I had the same problem 3 months ago at 38,000 miles. Then i had the CEL on, took the max to Nissan and they replaced the air/fuel sensor on the left/right banks and cleaned the MAF. Before this started i got 22city/37hwy. Before the CEL started coming on i was at 17mpg city & highway. I could tell something was definately wrong. After the bank sensors were replaced i'm back up to normal mpg. Also, I have a turbonator installed. It gives me about 4+ mpg city/ 6+ hwy. Get one from autobarn.com if you don't have one.
#31
How do people come up with #s such as 37MPG/HWY ??? Do you reset the computer then make a reading a couple miles later down the road ? There are #s that are not real. What really counts is how many miles traveled and how much gas taken between fillups. About the Turbonator, is it a joke right !?
http://www.turbonator.com/
Anyboby wanna waste $49 ?!
Somebody should call GM and FORD, ask them to replace the big V8s with smaller V6, throw in a couple of Turbonators and we have a 37MPG SUVs with 300HPs. Problems solved ! How come nobody knew about this before ?
http://www.turbonator.com/
Anyboby wanna waste $49 ?!
Somebody should call GM and FORD, ask them to replace the big V8s with smaller V6, throw in a couple of Turbonators and we have a 37MPG SUVs with 300HPs. Problems solved ! How come nobody knew about this before ?
#32
Maxfan, well considering that a good friend of mine and I bought out Maximas within 2 weeks of each other. (2004) if we swap cars and drive our usual way my car still has at least 6+ mpg than his car. I've recommended the turbonator to others at work. The 3 guys who each got one have improved range per tank now(they don't have onboard cpu to read specific values of mpg) BTW do you know what the function of a turbo does or better said what results when increasing air to the engine any higher than being naturally aspirated? Better power/fuel economy.
Also, these readings are usual on highway cruising at about 65 at more than 30 mile drive. Of course when I do > 90 mph my reading is about 24 mpg. Still great for such high speeds.
Also, these readings are usual on highway cruising at about 65 at more than 30 mile drive. Of course when I do > 90 mph my reading is about 24 mpg. Still great for such high speeds.
#34
I get 99.9 MPG Hwy .... but thats only when I'm coasting down this 2 mile long hill near my place
I used to get better mpg and mine has started going down too.
28-29 vs 25-26 HWY on the same trip,before winter gas .... not sure if they started using ethanol blends around my area,if so that would account for the 10-15% loss in mpg they talk about.
I've had new plugs,air filter installed (60 K) seemed to help a little.I want to check into that MAF cleaner thats out and see if that helps any.I'm also wondering about the O2 sensors .... any chance after so many miles that they can affect your mileage?
TURBONATOR
a few magazines have already tested that and a few other devices and called bullsh*t on them .... so I'm with the camp that sez if it was that easy wouldn't the big 3 have it in their cars...ya know
![Laugh out loud](https://maxima.org/forums/images/smilies/lol.gif)
I used to get better mpg and mine has started going down too.
28-29 vs 25-26 HWY on the same trip,before winter gas .... not sure if they started using ethanol blends around my area,if so that would account for the 10-15% loss in mpg they talk about.
I've had new plugs,air filter installed (60 K) seemed to help a little.I want to check into that MAF cleaner thats out and see if that helps any.I'm also wondering about the O2 sensors .... any chance after so many miles that they can affect your mileage?
TURBONATOR
![Laugh out loud](https://maxima.org/forums/images/smilies/lol.gif)
#35
Originally Posted by MaxFan
I will be looking out for it on Discovery Channel. The turbonator should be the best invention of the modern world, forget the sliced bread.
This thing seems like that thing that came out called the "Tornado"....biggest waste of money, I noticed no benefits and in fact, I think I got worse gas mileage after I installed it.
#37
Originally Posted by jcalabria
.
How many miles on her? Mine was dismal till 4,500, then kept improving steadily until recently (now just over 10K). In Charlotte's miserable traffic she now averages about 21mpg, which is about 1 mpg better than my '03 with same engine & same general driving conditions.
If your doing 320 miles on a typical 15-16 gallon fill-up, that's not too bad, especially if you have fewer miles on yours than I have on mine.
How many miles on her? Mine was dismal till 4,500, then kept improving steadily until recently (now just over 10K). In Charlotte's miserable traffic she now averages about 21mpg, which is about 1 mpg better than my '03 with same engine & same general driving conditions.
If your doing 320 miles on a typical 15-16 gallon fill-up, that's not too bad, especially if you have fewer miles on yours than I have on mine.
#38
Originally Posted by joe_mo1971
I only have 3K on her. So, hopefully I'll se an improvement as I get up in miles. I'm in Charlotte as well. Where did you purchase your '07. I drove up to the lake and purchased it at Modern Nissan.
I got mine at East Charlotte. The '95 and the '03 came from there when they were still Independence Nissan - the '00 came from Superior. Mine was the first '07 sold in the Charlotte area. East Charlotte got the first two area shipments - Modern (Cornelius or Concord), Superior and Harrelson had no '07 stock at all at the time. Despite that, got mine for $300 under invoice... salesman called me at home at 8pm on June 30th desperate to make month-end quota.
I really wanted Precision Gray, but the only two SEs equipped the way I wanted (DPP + sunroof) were Sonoma Sunset and Dark Slate. Couldn't wait cause the '03 lease was up on July 5th. I liked the red but just couldn't break my black/charcoal/silver habit.
It was at least a month before I saw another '07 in Charlotte... still don't see a huge number of them. East Charlotte was hiding the '07s for a while... they had 50+ '06s still in inventory and the GM was afraid they wouldn't sell them without giving them away if customers had a choice. We were specifically looking for an '07. My wife and I drove through the lot at least twice a day looking for the first shipments that I knew were due because they showed up on the on-line inventory about a week before. My wife actually was there when the first cars were pulled off the carrier.
#39
Originally Posted by Killah Kane
This thing seems like that thing that came out called the "Tornado"....biggest waste of money, I noticed no benefits and in fact, I think I got worse gas mileage after I installed it.
I can attest to the fact that it is useless. My cousin used it on his vehicle to no advantage whatsoever.
#40