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    Thread: Improving gas mileage - Jetta 2.5

    1. Junior Member
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      02-22-2012 04:02 PM #51
      Quote Originally Posted by 845ryders View Post
      bull no way you got 444 miles of a tank in with a 2.5. your like the only person in the world to report that many miles.
      i once got 400 miles before my gas light popped on. 2007 rabbit 2.5 stock 5spd

      did the math afterwards and it turned out to be 30mpg.

    2. Member goldenhalo's Avatar
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      02-22-2012 05:03 PM #52
      I have a 2005.5 Jetta, 2.5L. Best mileage I have gotten so far, has been right under 29mpg. And I do drive mostly highway to and from work. Otherwise, I'm somewhere between 24-26 mpg. I don't try too crazy, but I do get on it every so often. It does help to not rev above 3k, that's for sure. My mileage improved after I replaced my plugs and cleaned out my system (Seafoam anyone?). But I dunno, it's a 5 cyl, I don't expect 30+, but I bet I could do it with nice long highway drives on a trip or such. My old Grand Am GT (2.4L 4 cyl 5-spd) used to get 32 mpg all the time around the city, but again, it was a 4 cyl.

      On that note, I did just put on a new catback system, and was told my mileage would drop, so we'll see. I would like to do a cold air intake, I've heard that helps a little.
      Last edited by goldenhalo; 02-22-2012 at 05:06 PM.

    3. Member MKVJET08's Avatar
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      02-22-2012 05:26 PM #53
      I wish I was stock again after seeing y'all's numbers. I get 24 at best, all highway, driving like a grandma.
      They're going to their house over there.
      You're not utilizing your education properly.

    4. 02-22-2012 05:49 PM #54
      On my Rabbit I get about 26-27 mpg avg. and my low gas light comes on around 320-340 miles.

      Start with the free options like reducing unneeded weight and drag, but consider that to yield anything more then 2-3 mpg improvement you need to do more drastic things that are either expensive, and cancel out the purpose of saving gas, or heavily modify your car.

      Mid to upper 20's isnt bad but if gasoline rises another .50-1.00 and looks like its going to stay there for atleast a few years I would seriously consider a tiny car that gets upper 30's or more, providing it would be fairly close to an even trade in terms of car value. However a tiny car like a Smart Fortwo or Scion iq doesnt bother me because I rarely have other people in my car, I don't drive alot, and dont carry around alot. Going from 27 to 37 mpg will yield a $350 savings per year on gas for me if gas averages $4.50 which I think is very possible. Not worth it if gas averages less then that in the years upcoming and or if the replacement car is more expensive.
      Last edited by konsole; 02-22-2012 at 05:51 PM.

    5. Member v408w's Avatar
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      02-22-2012 06:00 PM #55
      gas is 4.30 for 87 here
      A great man

    6. Member MKVJET08's Avatar
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      02-22-2012 06:01 PM #56
      Quote Originally Posted by v408w View Post
      gas is 4.30 for 87 here
      Holy hell!

      If it gets any higher people in CA are going to start hooking for gas money.
      They're going to their house over there.
      You're not utilizing your education properly.

    7. Member v408w's Avatar
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      02-22-2012 06:17 PM #57
      Yup where I normally get gas I am paying around 4.50 for premium
      A great man

    8. Junior Member
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      02-22-2012 09:25 PM #58
      I have been averaging in the high 20's since I bought this car almost 2 years ago and over the last 18k miles. I have only missed a few fill ups in my log, and I have averaged as high as 32mpg on a single tank and my low is around 24 or 25. I usually don't beat on the car at all. I have a 35 mile commute each day which is mainly non-congested back roads a small amount of highway. Just take off easy and don't romp on the gas, I normally shift between 2-2.5k maybe 3k (unless getting on the highway), and i typically go straight from 3rd -5th in normal driving (5 speed). I have had a Neuspeed P-Flow for about a year and half and put on a votex exhaust about a month ago.
      While not the most fuel efficient car I don't think it's that bad.

    9. Junior Member
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      02-22-2012 09:43 PM #59
      I'm now driving a 98 GLX that gets between 25-27 miles to the gallon depending on how I drive it. My wife drives the newer 07 Wolfsburg 2.5 and has gotten around 28 on it through two tanks. I can drive the GLX round trip 16 miles a day for a week on $20 worth and she drives the Wolfie about 50 miles roundtrip a day for a week with a fill up.

      I'm completely content with the mileage we're getting out of both cars because both are an impressive gain over the $100 a week I was spending on gas driving my 2006 Dodge Dakota that averages 17 miles to the gallon.

    10. Member goldenhalo's Avatar
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      02-22-2012 09:43 PM #60
      Quote Originally Posted by shiva916 View Post
      I have been averaging in the high 20's since I bought this car almost 2 years ago and over the last 18k miles. I have only missed a few fill ups in my log, and I have averaged as high as 32mpg on a single tank and my low is around 24 or 25. I usually don't beat on the car at all. I have a 35 mile commute each day which is mainly non-congested back roads a small amount of highway. Just take off easy and don't romp on the gas, I normally shift between 2-2.5k maybe 3k (unless getting on the highway), and i typically go straight from 3rd -5th in normal driving (5 speed). I have had a Neuspeed P-Flow for about a year and half and put on a votex exhaust about a month ago.
      While not the most fuel efficient car I don't think it's that bad.
      How do you feel about the P-Flow? I just put my Votex exhaust on last night, love it so far.

    11. Member VWMoparGuy425's Avatar
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      02-22-2012 10:06 PM #61
      Weld up your combustion chamber, polish it, surface it -0.005, and dynotune it. fuel economy will get better I have done stuff like this before on previous builds.

      http://forums.vwvortex.com/showthrea...and-MPG./page2
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    12. Member magics5rip's Avatar
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      02-22-2012 10:29 PM #62
      Quote Originally Posted by VWMoparGuy425 View Post
      Weld up your combustion chamber, polish it, surface it -0.005, and dynotune it. fuel economy will get better I have done stuff like this before on previous builds.

      http://forums.vwvortex.com/showthrea...and-MPG./page2
      You are basically just increasing compression...could you not mill the head down a few thousandths and achieve the same result? Assuming there is no interference between valves/pistons...

    13. Member VWMoparGuy425's Avatar
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      02-22-2012 11:31 PM #63
      Quote Originally Posted by magics5rip View Post
      You are basically just increasing compression...could you not mill the head down a few thousandths and achieve the same result? Assuming there is no interference between valves/pistons...
      I just wanted to stay on the save side. I have had my fair share of bad luck. Just welded the quench pad because it didnt interfere with the deck height and P to V too much with only .005 shaved off. just really wanted to clean it up just in case there was any little warping.
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    14. Member A1an's Avatar
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      02-23-2012 09:51 AM #64
      My wife drives like a grandma and typically doesn't get more than 350 miles before the light comes on. Car in question is a Rabbit with a 5-speed with a roof rack.

    15. Member BIGJEFF64's Avatar
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      02-23-2012 10:32 AM #65
      i need to change my plugs and air filter!!!!

    16. Junior Member
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      02-23-2012 11:19 AM #66
      Quote Originally Posted by goldenhalo View Post
      How do you feel about the P-Flow? I just put my Votex exhaust on last night, love it so far.
      I actually like mine, that was my first mod (along with some smoked side markers lol) and have been very pleased with it. It was pretty easy to put on (took about 30 mins tops) and the sound is great. The only thing I find is slight buzz or rattle from it when the engine is at low revs under load (around 1k rpm) but it passes within 2-300 rpm.


      A1an - try taking the roof rack off if you aren't using it all the time. I usually go at least 350 miles and re fill a bit before the gas light comes on. Racks tend to add a lot of drag to the car.

    17. Member tonsef's Avatar
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      02-23-2012 03:34 PM #67
      I average about 29~30 mpg on my way to work, which is 15 miles away (with a 2.0t). I, stay in nuetral a lot of the time and use cruise control on the more flat sections of roads. also i'm not sure but according to some the tune will help your mpg, maybe a cai.

    18. Member fierostetz's Avatar
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      02-29-2012 01:55 PM #68
      Quote Originally Posted by shiva916 View Post
      I actually like mine, that was my first mod (along with some smoked side markers lol) and have been very pleased with it. It was pretty easy to put on (took about 30 mins tops) and the sound is great. The only thing I find is slight buzz or rattle from it when the engine is at low revs under load (around 1k rpm) but it passes within 2-300 rpm.


      A1an - try taking the roof rack off if you aren't using it all the time. I usually go at least 350 miles and re fill a bit before the gas light comes on. Racks tend to add a lot of drag to the car.
      i feel like the filter that came with mine sucks; it was a TOTAL beast to fit on the end of the pipe - same for you?

      I'm thinking about changing to a larger/better filter.

    19. Junior Member
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      04-12-2012 05:28 PM #69
      I also have bad milage but few fill ups I decided to try higher grade gas and I was suprised that my milage go up to 22-23 mpg from 17-18 mpg even though I have sticking caliper at the back and same driving routing as always.

      I was using 87 grade but filled with 89. Back in mainland I always used 89 with ethanol for best result as well. It's no in my head as I calculate it after each fill up.

    20. Member thygreyt's Avatar
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      04-13-2012 01:50 AM #70
      Quote Originally Posted by WDM1980 View Post
      Hey all,

      I’m looking for some advice on the best ways to improve the gas mileage on my Jetta 2.5. It is a manual and I do try and shift before the tach hits 3000.

      Besides putting in a K&N filter is there any other non-major work that I can do to the car to make it consume less?
      i get 28 mpgs on almost every tank.

      3 key things:
      -learn to drive in neutral
      -maintenance is paramount
      -mods help (sw, intake, etc)

    21. Member jtrujillo86's Avatar
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      04-13-2012 01:33 PM #71
      Quote Originally Posted by thygreyt View Post
      -learn to drive in neutral
      This is huge. Any chance I get at coasting down a hill or anything like that, I always jump on it...ven if I'm on the interstate. I also have a set of Bridgestone Ecopia A/S tires that have helped too. On a full tank of highway driving, I regularly see 33 MPG.

      - Jeremy.
      Quote Originally Posted by BluMagic View Post
      It's a VW; the sensors are as sensitive as women on that time of the month . . . and the dash is as anxious to light up as a stoner.

    22. Member
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      04-13-2012 02:10 PM #72
      Quote Originally Posted by PG MK5 View Post
      my city average is 12.4L/100km (18.9 mpg)
      my highway average is 8.7L/100km (27 mpg)
      city/hwy average is 11.6l/100km (20.3mpg)

      i have a 06 2.5L with no mods

      wtf?
      i dont drive too crazy
      same for my 06

    23. Member nebilex's Avatar
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      04-13-2012 02:31 PM #73
      I think the OP question got somehow hijacked from what do you do to get improved gas mileage to Hey I get xyz.... anyways, I get 25.4 city. Normal driving, shift under 3k, i actually put regular gas, change oil every 5k. Car only has 23kmiles now and it's 5 speed.

      Have a nice weekend all

    24. Member magics5rip's Avatar
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      04-13-2012 04:00 PM #74
      Quote Originally Posted by sWeEtL0u View Post
      same for my 06
      You and PG5 need to do 3 things:

      Custom exhaust - the stock center res is a huge choke point. I went with a 6" round Magnaflow muffler where the front res is location + stock GTI rear with a suitcase delete.

      Intake - obvious resions

      Tune - UM tune open the car up big time and even gets you a bit more efficiency as well.

    25. Member jtrujillo86's Avatar
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      04-13-2012 07:27 PM #75
      Quote Originally Posted by Tacoma750 View Post
      My car seems to do pretty well on the highway...but I live in the City and I like to run out 1-3 gear. I should stop doing that since gas is ridiculous and I usually see about 20 mpg or less in the city.
      That's especially hard on your engine, too.

      - Jeremy.
      Quote Originally Posted by BluMagic View Post
      It's a VW; the sensors are as sensitive as women on that time of the month . . . and the dash is as anxious to light up as a stoner.

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