Rooster286

I do mostly highway driving. With a 95GXE Auto. I've done a search and see some people getting upwards of 400mpt. Anyone think something is wrong with my milage, it seems to work out to roughly 20mpg or so. I've kept track with my last 3 TOTAL fill ups, and run it down to the gas warning light.

334 First Tank
344 Second Tank
340 Third Tank


Any reccomendations are appreciated. Thanks in advance.

JUDE

iTrader: (7)

I'm not sure. For the past three tanks I've checked mine and I have not gotten better then 250 miles to the tank. Of course I don't take it all the way down to zero and I also drive in the rush hour traffic of Miami.

Conrad283

iTrader: (2)

i have about 250 after 3/4 of a tank ... rarely let it get below 1/4 ... most of the people that you read about getting 400 mpt is because they have a supercharger ... i read that thread and the most i saw was 500 miles on one tank of gas ... but for us non-supercharged people i think 340 is pretty normal

dmBK

iTrader: (3)

i'm testing my mileage this week too. me thinks i'm not getting much more than 200 miles (50/50 street/highway)

Rooster286

Cool

I had no idea that a supercharger gives you extended milage???

mb1

iTrader: (2)

I get around 350mpg consistently on 16gals. 250mile a tank is realy bad.

WaarrEagle

iTrader: (1)

I get around 260 every time. I get 16-18 MPG. I guess its the way I drive and all this hills/stop and go driving around here. The best I ever got was 400 and that was ALL interstate.

maxguy714

uh lets see...i get roughly 360 mpg...wouldnt a supercharger take gas??? its run off by the engine not like a turbo where its run off of exhaust... anyone know for sure?

BriGuyMax

iTrader: (1)

yes...I don't know where people are getting the idea that a S/Ced max will get better gas mileage....becuase it WON'T! The phsyics of it simply don't work....S/Cers are parasitic...and therfore require some power from the engine to operate...like an A/C compressor...if you drive with your A/C on all the time...you will get lower gas mileage...same with having a supercharger.

multiplexor

curious... but i heard somewhere that once your upto speed and then turn on the a/c compressor, it won't use any more gas then as if it were off. But if you have it on while your picking up speed from a stop... then it will use more gas

Conrad283

iTrader: (2)

http://forums.maxima.org/showthread....&highlight=gas

BEJAY1

iTrader: (19)

340's pretty average. I've averaged 351mpt on a 5sp (over 4 yrs). Best was 443mpt. All depends on your driving style and gas (summer vs winter if applies)

caneyebus

well here is something that i noticed when i shatered my bumper and was getting more oxygen to the engine i was able to go from ny to dc and back on 1 tank of gas. But when i got it fixed i can do it on bout a tank and a half!!!

Rooster286

That's what I thought :P Got me really confused for a minute though. Damned misinformation

I get that gas milage with my Check Engine light on all the time too....Knock Sensor is faulty. I had read someone before that with the light on, you run a richer fuel mixture....is this also false info??? thanks!

Shadow

iTrader: (15)

Well, on the highway, I've been getting better mileage w/ the SC. I usually cruise at 85-90 on long trips, and before, the car would struggle to hold that speed. I used to only get like 23-24 mpg on the highway. But on the last roadtrip I took w/ the SC, I got 26-27 mpg highway. But overall, my mileage is terrible w/ the SC. About 300 to the tank with a mix of highway and city. I used to get about 350. If I drive it hard, then sometimes I only get 250 to the tank.

maximachad

I would say that 340 isn't bad, but your mileage could be better unless you drive your car hard all the time. I have a 5 speed, and do mostly highway driving which helps, but I always get 400 miles on a tank. My record is 450 miles on one tank - I've hit 450 twice now, but my light has been on for a while at that point
-Chad

95MaxSE

I never keep track of miles per tank. I always translate to mpg. Mine is a 95 SE Manual. For the first 100K, I averaged 22mpg. From then on, it got better and it's now at 24mpg. I drive quite hard, and have about 50/50 city highway mix.

jran76

Stock, I usually got at least 400 miles (390-420), and as much as 450 mpg.

With Mogs (intake, y-pipe, cat, exhaust) I usually get around 350 (330-360).

The only thing I would say about the SC, is that although power is robbed from the motor (used to drive the belt), not as much power is used to, say mantain a particular speed. I.E. to accelerate to 100, the NA engine has to work much harder to get there than the SC engine, or the extra power created by the SC is greater than the energy used by the SC to create that power. I would say under normal conditions the SC should decrease mpg, but under certain driving conditions, who knows....

ardika

iTrader: (3)

..... Summer 2001, Wisconsin-Colorado-CA-Seattle-Montana-Wisconsin, I got 29-30 mpg with 99% highway and tires at 30/30. City is about 24-25, with 26-28 with mixed. Plain stock everything.

October 2001, my mpg is up a bit, to 30 mpg highway and 25 city due to Stillen K&N filter.

These days...when it's realy cold outthere, I am getting 25 mpg with 80% highway and 20% city.

95MaxSE

That is amazing! On the long summer 2001 trip, what was your average speed? And what year, model is your Maxima? Manual or auto? Thanks.

breaux124

iTrader: (1)

I get about 300 miles between my 14-15 gallon fill ups

Check you air pressure (cold), replace spark plugs every 60k miles, and fuel filter as recommended.


Driving style, speeds, and location make big differences. When I drive during the week I get my 300 miles with some stop and go. If I'm driving to the shore, I get over 400 since it's all highway.

ardika

iTrader: (3)

My average speed is from 72 to 80 mph. I figured that the mpg just went downhill when you leave the "sweet spot of mpg" of 74-78mph. Cruise control is enganged when the street is level, but I switched to manual throttle in Colorado and other areas when it's hilly...

I have 1997 GXE Auto, it was only 89900 when I bought it for the trip, and it is now at 109635.

Till today, I only put the car to cruise control at 74mph, and I am only getting 25 mpg from my weekend commute from Milwaukee to Madison, WI back to back.

Steve Marsh

512 per tank has been my highest. I average between 450-500 miles (99% highway driving)1,100-1,300 weekly. I am quite sure that i could go a little higher. I have had my maxima since it was new (second one), and feed/maintain it with nothing but the best. I have a "strict maintenance routine" that would drive a dealer bonkers! 96se auto 166,200 miles, all Amsoil lubricants/filtration, redline "Water Wetter" 104+ Octane Booster (red bottle) always super unleaded, always! Either Sunoco Ultra 94 and or Texaco systems 3 super unleaded. And when i mean strict maintenance i mean strict maintenance! My car has feather like gas pedal acceleration/silk smooth like transmission shifts! Oh and that 512 mpt is what the low fuel light out! I really never let my fuel get too low (running on fumes), whereas your fuel pump could burn out!

Best Regards !

dko

iTrader: (7)

jesus, my car is getting **** awful milage. auto 96, good tire pressure (29 all around), clean air/fuel/oil filter, just changed oil... but here's the thing, i do warm it up for about 10-15 mins before i get in. yeah i know I should drive it and all that, but I hate to get in a cold car in the morning. i also drive like i stole the damn thing, so that can't help either... so far i've gotten about 240-260 a tank in chicago this winter. don't have summer figures cause i bought it in september.

max222

im lucky to get 260 to a tank, but i drive like an a-hole, and its all city. if i do all hgwy, im up around 400 mpt. i guess it all depends on how you drive. i did notice that when i got my jwt intake, my mileage jumped up quite a bit. id bet after a while that intake will pay for itself

Steve Marsh

I believe in warming up my vehicle too! Imagine being force to wake up in the middle of a deep sleep (nice dream Janet jackson) .Only to go out into the cold to jog for 5 miles ! Hey thats just from my brief perspective ! Oh and my avg speed is 75-80 mph!

OriginalMadMax

You can save mileage with an air conditioner on while cruising because the windows are up and the car is more aerodynamic. Open windows create drag. As for mileage on s/c Maximas, I thought I caught a thread recently where those guys were only getting 16-18mpg. My car gets about 22-23 average. I think I did better before the mods, but maybe the wider stickier tires makes the difference.

ardika

iTrader: (3)

Steve, I don't use the octane booster and all, but I do use synthetic oil (changed every 4500-5000k) and your figure of 514 miles is pretty much the same as mine when I did the roadtrip.

Steve Marsh

ardika, the synthetic oil plays a big part in it! I use Amsoil 0W-30 2000 series. The less drag on the engine regarding motor oil weight the better the mileage, in addtion to the many other benefits of synthetic oil itself. I am going to try and defeat my previous 512mpt mark this summer. Hey just keep that oil good/changed. Oh and a little fuel injection cleaner would not hurt (protect those injector$$$$$$

ardika

iTrader: (3)

Steve......hmmm...the 0W30 sure is tempting to use... I am planning to change the transmission fluid this summer as well (1 year period) and the brake fluid (no clue how long it's been there). One of the member in this group is an Amsoil dealer, and I am thinking to order the oils from him in the near future.

About the fuel injector... I got it covered two weeks back. Drove to WalMart and put the Castrol Synthec Fuel System Cleaner and refill..... plan to use this about once a year.....

I see that we are in the same road for our cars.....

breaux124

iTrader: (1)

My 97 SE recommends 32psi front and 30 rear. Not sure if you're tires require different pressure.

Also make sure you're checking pressure when it's cold.
Look here:
http://www.tirerack.com/tires/tirete...l/pressure.htm

Air pressure makes a BIG deal in your gas milage

98MAXNY

I have a 98 auto se and I just took a 300 mile road trip and only got 21 mpg. I have no mods and had major tune up and just changed oil and flushed tranny fluid. why arent I getting good gas milage. had the car 2 months and not liking it as much as i would.

ptatohed

iTrader: (12)

I am approaching the end of my second full tank since the SC install. I have about 1/16 left and I am at 350. So I might not hit the same 400 as before but it will be high 300's. This slight reduction might be due to using AC now that the weather is warming here in S.D., I was stuck in an aweful traffic jam for hours one day and I have had more 'racing offers' this tank. So I think 400+/- per tank (or mid-20s m.p.g.) is what I can expect from now on. Don't ask me to explain it but yes, my gas mileage went up with the SC.

OriginalMadMax

Maybe we should be comparing gas from different regions. Here in California we get 91 octane only, and I only get 23mpg, about 325+ mile per tank. Maybe we should be using octane booster here.

ptatohed

iTrader: (12)

Oh yeah, it kills me that we only have 91 now. I was thinking of using octane booster as well. I actually have a bunch in my garage as it made more of a difference with my G-Force ECU (had to take out the ECU since they don't make an SC program yet). I will try it and let you know. So my 400 miles on one tank was on 91 octane (Unical 76). How long ago did they take away our 92 originalmadmax? 6 months ago or so? Well, someone told me at Stillen that they really still have 92 in the pumps. They will have 92 for a year. That way if anyone starts to notice problems with 91 octane, they can say 'hey, it isn't the octane, you've been using 91 for a year now'. Just what I heard, I don't know if it's true or not.

Steve Marsh

hey ptatohed, whenever you are in heavy traffic especially in hot weather. Always allow 3-5 feet of space between you and the next driver that is in front of you. Your car will run hotter,burn more gas, and you oil and or your air filter may collect lots of B.S. exhaust emissions (hot dense exhaust gases). This is true especially when your in very hot humid weather with your car ilding on the freeway in heavy traffic. How is your VQ doing with the super charger, any BMW 540i challenges yet ?

RykrosGT

A supercharged 97+ Grand Prix GTP will consistently and reliably get 2 to 3 mpg more on the highway than the GT. GT's sit around 28-29mpg, while I've seen numbers on my GTP as high as 32.5, cruising at 75mph on I-696 (kind of hilly freeway)

Steve Marsh

hey ardika, (104+ Octane Booster (red bottle) is excellent as is Chevron fuel system cleaner is very good) check out the following links !
www.goldeagle.com/104plus/products.htm
www.ftc.gov/search?ns-search-page=results upon the opening of this page type in "motor oil".

www.amsoil.com if you have not had the chance to check out the specs of their 0w-30 motor oil/filters this is the link. Best Regards

ardika

iTrader: (3)

...Steve, just contacted one of the members in this forum to hook me up with Amsoil lubricants for tranny and engine oil. He replied to me and I definitely go for those when the summer is here (and my oil change is due).

You are right about Chevron, they have very good gas....I used them when I was in California for the road trip, and came to conclusion that my car likes Mobil, Conoco and Chevron the best out of any brand of gasoline out there.

OriginalMadMax

I don't think it was even 6 months ago. Who knows what they are giving us? Seems in California they are experimenting with something different all the time.