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Nissan XTerra Real World MPG



  • Ok, the numbers are

    almost 1000 miles round trip

    17.2 on the way down

    17.6 on the way back

    cruise set on 80 with tach at 2500.
  • pdclaypdclay Posts: 7
    Thanks for letting me know I am not the only one. Like the dealer said it is only me getting horrible gas mileage. I have never had a six cylinder get such poor mileage and I have had different six cylinders since 1975 (a 1966 model). I think Nissan has changed something. At $4.00 a gallon gas they need to figire out what is getting the poor mileage and change it. Quick. Next time time Toyota.
  • gobogobo Posts: 4
    New S model with manual transmission --- so far about 600 total miles almost all highway, mostly at 70-75 MPH and getting about 19.8/gallon right now. Typical trip is 240 miles round trip with first half a moderate climb almost the full 120 miles and into a stiff wind coming off the mountains; tail wind on the way home. About what I expected but hoping for more as it breaks in...
  • asaasa Posts: 359
    Y'all drive a lot faster than I do and my driving is on low rolling hills, so perhaps that's why my V-6 6-Speed Frontier Crew Cab 4x2 is yielding better. My 22-1/2 to 23 MPG is at 65 to 70 MPH. As y'all know, wind resistance increases geometrically -- fuel economy losses at higher speeds get worse by leaps and bounds with each small increase in speed. Frankly, my brain is too puny to react at 80 mph (117 feet/second!) :-)

    To pdclay, the Xterra has a traditional 5-Speed geared automatic transmission -- it's never had a CVT, in North America at least.

    I wonder if it would do any good to disconnect your battery cable for an hour and let the computer reset. I just got my truck back from the dealer and my MPG is bad because it has to re-learn my conservative driving style. At least I hope that's the problem!
  • gobogobo Posts: 4
    Well, I've now logged about 2500 miles in my new 2008 Xterra S 4WD with manual transmission and I'm averaging 21.7 mpg. Almost all that mileage is highway and I use the cruise control probably 70% of the time and set it at about 75...

    I've noticed the milage is considerably less when I've been up in the hills offroading, but I think that makes sense. All in all I'm quite pleased with the mileage but not so excited with gas approaching $4/gal...
  • Man, you guys are lucky...getting 20-something a gallon on the highway. I've got an '06 with the 6-speed and 2WD, which gets me somewhere in mid-teens range. That's including freeway driving, which is where most of my 32,000(almost 33k now) has come from.

    When I bought this Xterra in September of 07, it had just over 12,000 on it. Now, isn't fuel economy supposed to increase as the engine is broken-in more? Or is the Flowmaster muffler I have on it robbing me of efficiency? Hopefully putting a cold-air intake on it(yay for stimulus check!) will get me some more economy...
  • dat2dat2 Posts: 242
    Hi, How has your mileage been, has it been improving? I'm thinking about buying a 2wd 6sp 08 Xterra! Thanks for your advice.
  • dat2dat2 Posts: 242
    Just purchased X model 4x2 6 speed. 1st 3 tanks so far have ranged between 20-22 mpg in mixed driving. Amazing for a new car!
  • xtierraxtierra Posts: 55
    ok guys..... i am hoping to get everyones opinion....... many xterra owners have had their fuel gauge malfunction and also their purge valve on the carbon canister on the fuel system....... for those who dont understand the system , the fuel tank has a vapor line that goes into the carbon canister to collect the fuel vapors and to be released into the intake..... the carbon canister has 3 hoses.... breather from tank , line to engine for vapors, open breather line attached to the purge valve that is no more then 8 inches long and attaches to the inside of your xterra frame...(open to be exposed) so having rolled 100,000 last week, i feel that even through i am not a mechanic i can give my opinion through my own dealings with the carbon canister and purge valve.... my valve went out at 44k..... replaced and 56k miles later again service engine light came on..... the only thing is that my fuel gauge has not worked for over 5 months since the company was paying for my gas.... now that this arrangement has changed,, i felt the need to know my mpg...... filled up on friday pass the full line.... and 25 miles later..... its showing 3/4 ...... yes 25 miles for 1/4 of gas!!!!! i have taken care of my truck like a kid.... 3,000 oil changes.... 30k service at 25,000 miles.... 60,000 miles transmission fluid..... 88,000 transmission fluid change..... radiator hoses changed at 88,000 spark plugs changed also at 88,000 miles...

    so what gives??????? your xterra 2005 and up has that open air line for the carbon canister... everytime you go off road or on dirt roads,,, you are exposing the dirt that gets into the frame of the xterra..... your system is being polluted .... when i just changed my purge valve last week,,, i found a ton of dust and dirt... took carbon canister and used a compressor to blow into the canister through the fuel tank breather line wich blew out a ton of dirt and dust out of the purge valve fitting.... so the dust in the system made its way into the intake area and i believe that my spark plugs are fouled from the dust........... this means that everyone that off roads needs to understand how the carbon canister works..... and a filter or longer breather line into the inside of the xterra needs to be placed.... i dont think anyone wants dust to be going into their intake via the fuel vapor line from the carbon canister line......
    i hope that everyone can check with their personal mechanics and get some feed back into this situation............ so does it mean that the off road model has a filter on that breather line?????????
  • xtierraxtierra Posts: 55
    i am willing to bet that your mass air sensor is dirty and you can clean it with mass air cleaner using gloves and making sure you spray the actual sensors..... also unlike my 2005 xterra.... if your xterra has a carbon canister like the next generation xterra, your carbon canister has a breather line that might be full of dirt and dust causing your fuel vapor line that sends the vapors from the gas tank to the intake to have some dust mixed with it causing your bad mpg...... all 2005 + xterras who use it to off road and dirt road conditions will have their breather line pollute their carbon canister thus effecting their mpg my opinion.....
  • gobogobo Posts: 4
    Sorry for the delayed response; haven't been here in awhile! I'm consistently getting 21.5-22.5 mpg at highway speeds - usually 72-75 mph. I now have just under 10,000 miles on the Xterra, which I got new in April of 2008. I'm very pleased with the vehicle and impressed with the off-road capability. Mileage in real off-roading is significantly lower --- in the 17 mpg range for very steep, rocky terrain. The 2wd would definitely not negotiate those roads...
  • dat2dat2 Posts: 242
    So I take it you must have a 4x4 (since you mention off roading)... sounds like very good mpg all things considered!

    I've had my 2wd 6spd just for about 3 months now and have driven 4000 miles. I usually get 22-24 on the hiway, of course the lower mpg above 75 mph. Around town between 17-19 mpg. Very good all things considered for such a powerful and solid utility vehicle.
  • bjssbjss Posts: 51
    Currently in a loaner '08 Xterra 2WD (for 2 weeks now), really solid vehicle, but MPG around town has been disappointing - averaging 13-14 MPG...vehicle has 14k miles on it.
  • asaasa Posts: 359
    Is your '08 2WD loaner an automatic or 6-Speed? Off Road or other (X, S or SE)?
  • bjssbjss Posts: 51
    Sorry for delay in responding...Loaner was Auto, S....
  • xtierraxtierra Posts: 55
    even though my 2005 xterra auto 2X4 just rolled 100,000 miles, i was shocked when out of no where my mpg was around 11 mpg city.... i began by cleaning injectors,new spark plugs, cleaned throtle body, new tranny fluid, new rear diff fluid....and moved up to 13 mpg..... with no service engine light on, i was very confused and began to think my engine had some serious problems- even checked oxigen sensors.......maybe a ring on the cylinder was going .... no oil leaks and always changed oil every 3,000 miles...... i was very pissed off..... no one could tell me what the problem was..... then out of no where, i did a 0 to 60 mph test to see how the engine would perform.... 9+seconds..!!!! so there was a problem somewhere... finally was recomended to a mechanic that checked for any leaks aorund air intake, and all around intake area.. everything was normal.. after he plugged in the computer and took some time going through the menu... he showed me that my engine was performing at 86%..... wow.... that was the reason for the 9 seconds 0 to 60...
    he re-set computer and told me about the re-learing procedure.... then after telling him everything i had done to the truck before the horrible mpg.... it all came back to me cleaning my battery posts and the ECU getting re-set... once i started the truck i drove as usual and the air/fuel mixture was set wrong.. causing my horrible MPG... so if any of you xterra owners have disconected your battery for any reason and your MPG is abnormal... that is the reason....
  • dat2dat2 Posts: 242
    So how do you reset your air/fuel mixture??
  • disconect your battery for 30 minutes.... then re-conect...... turn engine on.... the ECU is officially under re-learning air/fuel mixture mode..... allow engine to warm up... then plan your route to open highway.. keep RMP'S below 2,000 once on highway get up to 60 mph with low rpm's and stay at 60 mph for 15 to 20 minutes.... normally you should drive 50 miles for accurate ecu re-learning....

    if you have any doubts about your mpg and if your engine is consuming more gas than usual, you will not get a service engine light coming on... everything will look and sound normal... the best way to find out is the 0 to 60 mph.... if you have a problem, you will get 9.9 seconds..... as i did...

    when i got 9,9 seconds i though my engine had some serious issues...... i was wrong... just a simply re-setting ECU and driving with low rpm's while computer adjusted the air/fuel mixture.
  • rlissrliss Posts: 1
    fuel gauge dropping quick like that and staying on empty is the sending unit/fuel pump sold as one assembly piece for $425 -just replaced it on my '05 the flapper that floats on top of the fuel in the gas tank is conected to a circuit board and that is the problem on that assembly the board fried.
    Now service engine soon light came back on again. The nissan dealer plug it in and its the fuel vapor canister valve $138 piece.
    I do the labor myself these are nissan prices always have nissan plug it in to read out the problem my charges $110
    my 2005 4.0l automatic xterra gets mixed driving in the midwest at 18.5MPG and now has 89K miles
    just installed EBC Green stuff brake pads w/ slotted rotors and s.s. brake lines
    runs nice, Yeah I did 89,000 miles and there was still meat on the original pads
    so my MPG comes from steady driving
  • I just bought my 2007 2WD Xterra on Nov 11 09, I put 200 miles on her this past week, all around town..I have a light foot and after filling up today I saw I was getting 20.1 MPG...I am very happy with that . This is my 2nd Xterra and I am very glad to be back!
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