Why so low?
10-15-2006, 06:46 PM
#1
Why so low?
Hello all, I have just recently noticed a sharp drop in the good ol' MPG. In town hasn't changed...about 18-19, according to me, not trip computer. However highway MPG has taken a huge dump. Used to get 27-31 on highway depending on wind. Lately though, I am getting 22 - 24 MPG going 78, consistently (three tanks) with no wind at all...I also have an automatic.
10-15-2006, 08:12 PM
#4
Originally Posted by cpuguy06
hmm, well I never remember gettings 22-24 on highway. I was getting l ike 26-27 with stock air filter, then once i got the K & N it went up to where i said.
Air filter needs to be cleaned?
Tires improperly inflated?
Extra weight in car?
10-15-2006, 10:33 PM
#5
Originally Posted by chopstix2nrz
Crap gasoline?
Air filter needs to be cleaned?
Tires improperly inflated?
Extra weight in car?
Air filter needs to be cleaned?
Tires improperly inflated?
Extra weight in car?
Just cleaned K & N Drop In
Tires are inflated
No extra weight in car
On a side note, all this pretty much started after I made the horrible mistake of running a whole tank of 93 Octane with ethanol through my baby...
10-15-2006, 11:26 PM
#6
Originally Posted by cpuguy06
On a side note, all this pretty much started after I made the horrible mistake of running a whole tank of 93 Octane with ethanol through my baby...
10-16-2006, 08:07 AM
#10
Originally Posted by 808MAX-SPEC
If you started using E10 gasoline (10% ethanol) then that could be the reason. Back in April of this year when it became mandatory that all service stations in Hawaii sell E10 gasoline, I noticed a slight drop in mileage and performance. As of now, the car feels fine. You'll just have to get use to it.
10-16-2006, 08:54 AM
#11
Senior Member
Join Date: Aug 2000
Posts: 351
You CAN run on up to 10% ethanol w/o problems other than decreased fuel economy. Read your owners manual. E10 has been very common in the midwest for some time. It'll soon be everywhere now that it's federally mandated. Your milage decrease is most likely fuel related. Pumps are not always labelled.
10-16-2006, 09:59 AM
#12
Member
Join Date: Apr 2004
Posts: 290
Originally Posted by Sly
You CAN run on up to 10% ethanol w/o problems other than decreased fuel economy.
10-16-2006, 11:47 AM
#14
Originally Posted by Sly
You CAN run on up to 10% ethanol w/o problems other than decreased fuel economy. Read your owners manual. E10 has been very common in the midwest for some time. It'll soon be everywhere now that it's federally mandated. Your milage decrease is most likely fuel related. Pumps are not always labelled.
10-16-2006, 12:47 PM
#18
Originally Posted by † ErV †
O2 sensor.
Since the engine is not under much load on the highway, readings from the o2 sensors are used for A/F adjustments.
Whereas when in the city, MAF is more likely being used as feedback for A/F control, so in regards to your concern, city driving will not be affected by a bad primary o2, but highway mileage will be.
10-16-2006, 05:26 PM
#21
IDK, I am currently in Omaha, NE and I doubt they use winter blends of gas. I know in ND here they do. I added some fuel injector cleaner in my tank of gas today, we will see if that helps at all. If not, maybe dirty fuel filter. I know they are supposed to never need changing.....BUT...
10-16-2006, 05:57 PM
#23
Senior Member
Join Date: Oct 2000
Location: South Jersey
Posts: 1,329
Originally Posted by cpuguy06
BP (Amoco) Ultimate 92 octane
Just cleaned K & N Drop In
Tires are inflated
No extra weight in car
On a side note, all this pretty much started after I made the horrible mistake of running a whole tank of 93 Octane with ethanol through my baby...
Just cleaned K & N Drop In
Tires are inflated
No extra weight in car
On a side note, all this pretty much started after I made the horrible mistake of running a whole tank of 93 Octane with ethanol through my baby...
If you justed cleaned the K&N, and now you have a problem, it is always possilbe that you may have used too much oil and the oil is all over the MAF wire. Look inside the intake tube and see if any oil is past the filter.
10-16-2006, 06:00 PM
#24
Nmex - any way to test and see if its the o2 sensor?? Shouldn't I be gettin th SES light?
Sascuderi - The problem existed before I cleaned the K&N. Its the whole reason I cleaned the K&N.
Sascuderi - The problem existed before I cleaned the K&N. Its the whole reason I cleaned the K&N.
10-16-2006, 06:05 PM
#25
It could be a slowly dying sensor. I still do not undrstand how you got anything over 24 at that speed, since mine has never seen that good of mileage.
Also do not think it's the MAF :read my earlier post:
Also do not think it's the MAF :read my earlier post:
10-16-2006, 06:37 PM
#26
Originally Posted by NmexMAX
It could be a slowly dying sensor. I still do not undrstand how you got anything over 24 at that speed, since mine has never seen that good of mileage.
Also do not think it's the MAF :read my earlier post:
Also do not think it's the MAF :read my earlier post:
10-16-2006, 06:40 PM
#27
Member
Join Date: Oct 2006
Posts: 21
Originally Posted by cpuguy06
IDK, I am currently in Omaha, NE and I doubt they use winter blends of gas. I know in ND here they do. I added some fuel injector cleaner in my tank of gas today, we will see if that helps at all. If not, maybe dirty fuel filter. I know they are supposed to never need changing.....BUT...
10-17-2006, 07:29 AM
#31
Senior Member
Join Date: Apr 2003
Posts: 1,207
Originally Posted by cpuguy06
I NEVER NEVER EVER use ethanol. It makes my car smell like crap, and the mileage goes wayyy down.......like 10-11 in town. And I don't believe that we can run our cars on E10 anyways. Anyone know of any good fuel system cleaners?
Gasoline
Thread
Thread Starter
Forum
Replies
Last Post
litch
4th Generation Maxima (1995-1999)
123
01-04-2024 07:01 PM