NAH MPG blues.
#61
09-27-2010, 05:19 AM
Re: NAH MPG blues.
I could never really confirm that the solar panel was providing any MPG benefit. So, I removed it. Dealership thought it was pretty cool and asked a lot of questions, though.
#62
10-20-2010, 04:22 PM
Re: NAH MPG blues.
@realcanook:
I have been having the identical problem as of late. I do understand there might be a few things that can and will affect MPG/FE in ALL cars.
That being said,
I have a 2007 Nissan Altima Hybrid that has recently dropped its fuel range significantly approximately 3 fillups ago, my car has about 55,000 miles and I have identified one fault of mine which is that I have not yet replaced the air filter. Which I have ordered a K&N air filter and will monitor accordingly.
What I have ruled out:
*Tire Pressure: I inflate at 40 psi (a lil bit higher than minimum 35 psi)
*Oil change: I regularly get oil changes at every 3000 miles with conventional oil, I know synthetic is better but we have almost always been using conventional and NEVER had this problem before.
*Driving Technique: I employ hypermiling techniques as often as I can, with the exception of FAS or other crazy things. But I do not gun it in my car, and lately have been doing mostly city driving @ less than 45 mph and often times I coast lower so I can engage the EV mode.
*Type of Gas: I use Chevron gas as well (regular grade).
*A/C use: is minimumly used as of late as the temperature has lowered.
What I know could be affecting it:
Air Filter needs to be changed
Temperature change
Synthetic oil substitution
However, I am very skeptical that the above items could account for almost 200 mile difference in fuel range/actual miles in a car.
My wife noticed that if we turn on the a/c the range plummets, I might drive a half of a mile and the range drops by 10 miles! This can't be normal. And if we drive with it off completely, it still drops 3-6 miles per half mile versus 10. I dont think the air filter can affect the car THAT much. Any ideas? I have looked on other forums and realcanook, you are the only one I have found to perfectly describe the symptoms and you coincidentally (maybe not a coincidence) have a 2007 NAH AND live in SoCal. I also am worried/irritated/frustrated with the situation. I KNOW how dealerships are too....
I have been having the identical problem as of late. I do understand there might be a few things that can and will affect MPG/FE in ALL cars.
That being said,
I have a 2007 Nissan Altima Hybrid that has recently dropped its fuel range significantly approximately 3 fillups ago, my car has about 55,000 miles and I have identified one fault of mine which is that I have not yet replaced the air filter. Which I have ordered a K&N air filter and will monitor accordingly.
What I have ruled out:
*Tire Pressure: I inflate at 40 psi (a lil bit higher than minimum 35 psi)
*Oil change: I regularly get oil changes at every 3000 miles with conventional oil, I know synthetic is better but we have almost always been using conventional and NEVER had this problem before.
*Driving Technique: I employ hypermiling techniques as often as I can, with the exception of FAS or other crazy things. But I do not gun it in my car, and lately have been doing mostly city driving @ less than 45 mph and often times I coast lower so I can engage the EV mode.
*Type of Gas: I use Chevron gas as well (regular grade).
*A/C use: is minimumly used as of late as the temperature has lowered.
What I know could be affecting it:
Air Filter needs to be changed
Temperature change
Synthetic oil substitution
However, I am very skeptical that the above items could account for almost 200 mile difference in fuel range/actual miles in a car.
My wife noticed that if we turn on the a/c the range plummets, I might drive a half of a mile and the range drops by 10 miles! This can't be normal. And if we drive with it off completely, it still drops 3-6 miles per half mile versus 10. I dont think the air filter can affect the car THAT much. Any ideas? I have looked on other forums and realcanook, you are the only one I have found to perfectly describe the symptoms and you coincidentally (maybe not a coincidence) have a 2007 NAH AND live in SoCal. I also am worried/irritated/frustrated with the situation. I KNOW how dealerships are too....
I have a 2007 Nissan Altima that has recently gotten terrible gas mileage. The EPA standards allow for as low as 29 - 42 MPG in the city and somewhere in the low to high 30s on the hwy. However, my Altima is only seeing 23 to 27 mpg city and about 33 on the hwy. Note: This has only been doing this for a few months now. I used to see 34 city, about 37 on the hwy and 33 mixed.
I have ruled out the following problems:
Oil Change. - Done Correctly
Tire Pressure - Checked regularly by me and mechanics working on my car.
The type of gas - I put Shell Gasoline in it everytime. (Regular Unleaded 87 octane)
How its driven - I do the speed limit everywhere I go which is anywhere from 40mph to 55mph in city. Speed limit is driven on the Hwy.
According to the dealership the car is in perfect working order and nothing is being coded on the computer. In addition, mechanics test driving it reset the gauge on my onboard computer and claim its reading properly. (It isn't, there is at least 2 to 3 mpg difference from what i'm actually getting.) I have talked to Nissan Corp and it appears i'm the first one to call and actually complain to them about my poor fuel economy.
Has anybody else seen or heard of this??? I've tried everything and feel extremely frustrated with the poor results of my new car. Any input would be greatly appreicated.
I have ruled out the following problems:
Oil Change. - Done Correctly
Tire Pressure - Checked regularly by me and mechanics working on my car.
The type of gas - I put Shell Gasoline in it everytime. (Regular Unleaded 87 octane)
How its driven - I do the speed limit everywhere I go which is anywhere from 40mph to 55mph in city. Speed limit is driven on the Hwy.
According to the dealership the car is in perfect working order and nothing is being coded on the computer. In addition, mechanics test driving it reset the gauge on my onboard computer and claim its reading properly. (It isn't, there is at least 2 to 3 mpg difference from what i'm actually getting.) I have talked to Nissan Corp and it appears i'm the first one to call and actually complain to them about my poor fuel economy.
Has anybody else seen or heard of this??? I've tried everything and feel extremely frustrated with the poor results of my new car. Any input would be greatly appreicated.
#63
10-20-2010, 06:10 PM
need more info - "range" isn't helpful
@realcanook:
I have been having the identical problem as of late. I do understand there might be a few things that can and will affect MPG/FE in ALL cars.
That being said,
...
*Driving Technique: I employ hypermiling techniques as often as I can, with the exception of FAS or other crazy things. But I do not gun it in my car, and lately have been doing mostly city driving @ less than 45 mph and often times I coast lower so I can engage the EV mode.
...
*A/C use: is minimumly used as of late as the temperature has lowered.
What I know could be affecting it:
Air Filter needs to be changed
Temperature change
Synthetic oil substitution
However, I am very skeptical that the above items could account for almost 200 mile difference in fuel range/actual miles in a car.
My wife noticed that if we turn on the a/c the range plummets, I might drive a half of a mile and the range drops by 10 miles! This can't be normal. And if we drive with it off completely, it still drops 3-6 miles per half mile versus 10.
I have been having the identical problem as of late. I do understand there might be a few things that can and will affect MPG/FE in ALL cars.
That being said,
...
*Driving Technique: I employ hypermiling techniques as often as I can, with the exception of FAS or other crazy things. But I do not gun it in my car, and lately have been doing mostly city driving @ less than 45 mph and often times I coast lower so I can engage the EV mode.
...
*A/C use: is minimumly used as of late as the temperature has lowered.
What I know could be affecting it:
Air Filter needs to be changed
Temperature change
Synthetic oil substitution
However, I am very skeptical that the above items could account for almost 200 mile difference in fuel range/actual miles in a car.
My wife noticed that if we turn on the a/c the range plummets, I might drive a half of a mile and the range drops by 10 miles! This can't be normal. And if we drive with it off completely, it still drops 3-6 miles per half mile versus 10.
Clogged air filters apparently don't affect mileage significantly on modern cars. Yes, the temperature has dropped, which will affect mileage. For "so I can engage the EV mode.", you might be driving it wrong. If you are trying to keep the ICE off while accelerating, that's not the most efficient way to drive. It's a paradox that w/hybrids, even though you have a battery, you want to minimize use of it.
I suggest you either start a new thread or post answers to the questions at http://priuschat.com/forums/gen-ii-p...youre-new.html here.
I can tell you that from monitoring draw from the HV battery on my Prius (also has electric AC), it can draw a huge amount of power compared to idling w/o. On my 2nd gen Prius, idling w/ICE off pulls 1.3-2 amps from the HV battery (at ~220 volts). The AC compressor can make it go as high as 9.x amps.
Last edited by cwerdna; 10-20-2010 at 06:48 PM.
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