one of the many reasons ive become to hate my car

cute02spec wrote:

I must have a freak Spec...
easily got over 300... I could race all night and have 25mpg... usually got 27-32 on the highway.
hell, even with a turbo and shitty tune I get 20mpg



Tire pressure?  Old oil?  bad spark plugs?

All tires are at 35psi.
Oil is good.
Spark plugs are original. 43k miles. Says to change them at 100k miles.

Edit: I checked my plugs at around 35k and they looked fine

Last edited by Strychnine (2008-08-17 00:29:38)

I've been keeping track since February and so far my overall MPG is 27.51 mpg.  I shift between 2-3k and do a good mix of highway and city driving.  Sometimes I'll coast to a stop in neutral, other times I coast in gear (the injectors shut off).  I have a VERY casual driving style, no jackassery.  I'll punch it maybe once a day or so just for shits and giggles.

Strychnine wrote:

See this is what pisses me off. People who are boosted, supercharged, or have v8s get better gas mileage than me. I'm stuck driving this slow ass car shitty gas mileage car.

Hey man, we just need to take a step back and troubleshoot.  Its probably something simple.  Maybe check your O2 sensors, maybe check the plugs again.  Perhaps you should drop some money on a wideband or a trip to the dyno just to see if you're running ezzra ezzra rich.

first of all, decelerate in gear. it shuts off the injectors completely. you burn gas when you roll in neutral.

shift below 2k and on flat road, you can do it at 1500. this engine has torque. use that to your advantage. and go into the highest gear possible for that speed. I will be in 6th gear doing about 25mph and the rpms are right above 1000rpm. I never let the engine go below 1k rpm while in gear, if you do, it will strain and thats obviously not good for it. the torque will just push it along without straining. the lowest the cruise control will go is 25mph. cruise control, use it. dont accelerate too fast. fuck the other cars on the road and being nice to them by accelerating fast so they dont get mad. those days are over and gas prices are too high to waste your gas being nice to other people by doing that, fuck them and let them burn their own gas and dont let them force you to burn more of yours for their gain of simply passing and getting in front of you. This doesnt mean drive in the left lane and go slow. Remain a courteous driver and do not go out of your way for them if it means you have to burn more gas to do it. You still need to get over to the right if you can and not drive like a fuckin grandmother thats blind.

guys i havent seen my full tank of gas went over 290miles. city/highway im getting shitty milage as well. i have I/H/E thats it.

Last edited by shift_cloudspec (2008-08-17 02:25:30)

superspec wrote:

yea i can get 300+ in my car and before i went to the built motor and turbo i knocked on the door of 400 miles several times on long road trips.

...  im only getting 200 miles on ten gallons, and driving like a oldlady

Since I bought the car in 03 i've been getting 300-350 with mixed driving, and it did not change when I modded it, but I did notice I could get on it more and not burn as much gas when I tuned it.

ya, I have my 440 injectors installed getting ready for boost and I drive reasonably, sometimes getting on it here and there and i see 27 in city an spirited driving and up to 36 on the highway.

I have I/H/E/Chain Cut/Motor Mounts and I get 330-350 with spirited driving every night on the country roads. I get better mileage after the mods than when the car was stock

Has anyone tried the new Mobil 1 0-w30 oil? It's supposed to give you better gas mileage.

I typically get around 200-220 a tank depending on how I drive. That is with nearly 100% city driving and a good amount of ac use. On highway trips I can pull around 300 to a tank.

another trick you can do is to SAFELY draft behind semi's or other big trucks. safely as in not too close behind. any decreased wind resistance helps. i've had to do that in the past when running on fumes. funny how i seem to drive more economically/efficiently when i'm low on fuel...

Last edited by specVnismo2004 (2008-08-17 17:43:24)

I just recently calculated my gas mileage. I went 273.8 miles on 11.130 gallons, which came out to 24.6 mpg.  Thats with about 75% city driving. I also usually shift at around 2.5k but I can't say I don't enjoy hearing my secondaries open up every once in a while too.

The most I've gone is 320ish, I filled up before the red light came on though.

^ I'd say so.

If i do 80% highway miles I will get 350+ to a tank every time.

gmarrero89 wrote:

so buying an afc neo and actually getting it tuned would make a difference with my gas mileage? a local shop charges 225 an hour on the dyno, is that what they usually run at?

a tune might help, but 225 an hr is way too much. i pay $75 an hour at my local shop

I just did a trip from NW ohio to SW ohio with the AC on and avg 170 miles@29mpg.  I usually get 25-26 DD going to work and just other tom foolery.

I get 24-26 mpg on my 50 mile per day commute (mixed highway and city driving).  If it's all highway, I can get as high as 34 mpg.  I've never seen 400 miles on a tank though, but 300 on a regular basis.  BTW, I'm never nice to it and I almost never shift below 4000 rpms.  Downshifting saves gas too, as it shuts the injectors off while off the throttle in gear.  It has to use fuel at idle.

ok so im glad to see im not the only one, although I shift at 3-4k ive been getting about 260 a fill up since i got home from my deployment ive been getting back into the fun of my car but this week i tried to cut it back and im still only getting about 270 a fill up with I/H/E. I was debating on taking it to Nissan but I have a feeling they are going to try and blame it on I/h/E  so ill keep you all posted

Strychnine wrote:

RedDragonV09 - I just wanted to say that I tried your way on a whole tank of gas. I got on it probably like 4-5 times. I did have a problem with skipping 5th gear when shifting at 1,500RPM. It would start off below 1,000 RPM so I started using 5th gear.... I was shocked at how well I did. Before I was getting like 275-280ish on a tank. Your way I was able to get to 334 before the light came on.

See what I mean? Use the highest gear possible for your speed thats above 1000rpm, dont let it get under that, and if it does, downshift to the next lower gear. I cruise at 30mph in 6th and the torque  at 1100rpm will just pull the car, I dont have to touch the pedal unless I start going uphill. The throttle is open to about 0.2%-0.6% when I do this. You can put on Cruise and it will just chug right along with no worries.