Hey guys, last thing i need is to get flamed, so please don't do so.

Yes i know that there's been many fuel consumption threads, but im just so frustrated. I know it's a V6, i also know it's not a Civic, but with my consumption this high, maybe there's something i'm missing.

Here's a bit on my car, and what I've done recently.

-It's a 2000 Maxima SE A/T, 130,XXX miles
-NGK spark plugs done 2 months ago
-Ran seafoam through the crankcase/brake booster/gas tank about 2 months ago
-Brand new motormaster Air Filter
-Brand new Tranny from Nissan
-Coils nor MAF have ever been changed (as far as i know)

City driving with the car i'll get roughly 15-17mpg (15l/100km) and i'm very easy on the gas, hardly ever taking her above 2,800rpm

Higway driving is about 20-21mpg, going about 70-75mph.

Now i know for a fact that this is very low compared to what i have read in other posts from Maxima drives. Trust me i really do not expect super high mpg cause like i stated, this is a V6 beast and not a Civic, but my numbers are really low.

I'm really hoping that some of you can give me a hand or steer me in the right direction.

Please don't flame me, im only here looking for a little help.

Thanks

 

http://www.ehow.com/how_2629_increase-gas-mileage.html

 

i get about 22 drivin hard

 

Thats what I get. I didn't realized until recently how much the weather has to do with our mpg. I took a trip to Tennesse last year and with driving hard, I got 22-23 mpg roughly and 25-26 with highway. Up here in Boston, i get the same mpg you do. I've accepted it.

 

damn winter.
thing is, it isn't much different in the summer either

 

Many factors.
Do you use ethanel? (Ethanel doesn't save any money, only helps the environment/economy)
Winter blend makes a difference

You need to check your fuel trims. Without knowing where your fuel trims are you can't say what the problem is. You may be running rich or your 02's may not be switching properly. Do you get the sulfer smell alot(rotten eggs)??
If you are running rich, it can be from many different things. MAF, MAP, TPS, Spark, EGR, Exhaust leak, even your ECT sensor reading to cold can make you burn rich.

 

There's a lot of things to look at. Damn, and no i don't get that rotten egg smell.

I mean checking for all those things could cost a LOT of money, and not worth the actual 2-3mpg increase it might cause.

Maybe i'll start off by getting the injectors cleaned... See where that takes me. What can i actually check myself?

 

MAF!!!!

I just changed mine and i havent really checked my actual mpg #'s but i drive moderatly spirited... and i was getting like 45mi to the 1/4 tank... now im getting 70miles per 1/4 tank

 

Maf's make that much of a difference?

 

well yeah it does if your maf is a POS, but i have been driving a little conservative but i still floor it in traffic and when the road is empty

 

did you have any symptoms of a bad MAF to make you change it?

 

Did you check the tire pressure? I had a tire that had a slow leak in it. I was getting about 19-22 mpg. Once I got it fixed and the pressure stayed the same, I consistently got 24-25mpg(Altima not Maxima).

 

idk 15-17 sounds extremely low...granted yes winter does affect...my cars been lower in the mpg...id check the whole list that soonerfan sent you

 

i guess i can start off by cleaning my injectors at Nissan...

About faulty injectors, wouldn't i be throwing a CEL if that were the case?

Also wouldn't dirty injectors restrict the gas flow resulting in better fuel economy? (i know it sounds stupid)

 

If the injectors were dirty the o2 sensors would see that the engine is running lean and compoensate by adding more fuel by increasing injector pulse width.

 

Does nissan offer a fuel injector cleaning service? (and by that i dont mean just adding a bottle of cleaner into the fuel)

 

Nissan will use BG44K...or you can buy it yourself

 

my city/hwy is about 15-17 too but i don't care anymore. i've learn to just deal with it and not worry about it too much. but just this past week i've been driving hwy a lot more and i got 18.5mpg and i got so excited but ya just deal with it =/

 

I get the same gas mileage 15 to 17 per gallon.
Some times it surprise it gives me like 18 1/2 per gallon.
Just like lowincash said JUST Deal with.