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    Thread: 2.5L Fuel economy thread.--UNOFFICIAL--

    1. Member MK5golf's Avatar
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      08-11-2012 09:44 PM #226
      Quote Originally Posted by wetheitalians View Post
      how do u set the trip comp. to km on a car without an MFD?
      Is this possible? (in my case it would be vice versa)
      and lol at your user name sei parle italiano?
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      08-11-2012 11:27 PM #227
      I use the torque app also. It says 37.4 MPG average. I have Lubro Moly 0w40 synthoil energy oil in it (part no LM 2050). I never use the A/C and it is not flat where I live. That 37 sounds kinda high especially considering that I got 400 (28 MPG) miles that tank (I had it to that point when you pray that you make it to the gas station before you run out. I know it isn't a good idea to run a car that low on gas but I don't do that all the time. If anyone knows how to get the right reading from that Torque app feel free to PM me if you like, I run the app on a no contract phone and I have one on those ELM 327 compatible bluetooth dongles that you plug in under the dash.

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      08-12-2012 01:13 AM #228
      What would be the correct tire pressure I should be running to get best mpg on my car? I'm running 36 psi on falken 245/40/18s (max psi on them are rated for 50) so what do you guys think?

      I'm also running neuspeed P-Flo+full custom magnaflow catback (same exact setup as the kit)

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      08-12-2012 01:17 AM #229
      Also I don't got any tune right now and I only run Shell 87 but if I switched to Shell 91 would it benefit me at all or any worth it? Or waste of extra money/tank with my above setup?

    5. Junior Member
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      08-13-2012 10:54 AM #230
      Hey all-

      Just bought a used 2007 Rabbit and am getting terrible mileage-- like 12 mpg. HELP!

      Was a golf owner for many years- living in DC now, and haven't owned a car at all in 8 years. Recently moved to a part of the city were parking was easier, so i justified getting a car and opted for a used 2007 Rabbit (2 dr auto). I just used my first full tank of gas and got 163 miles total!!! Shocked- that's maybe 12.5 mpg. I'd say the driving was 95% city, but still.

      I will check the tire pressure, but anything else you can suggest? The car has a VW installed roof rack, so I imagine that is affecting the mileage, but online accounts vary as to how much that impacts- anyone have any first hand knowledge with the 2.5L and roof racks? I am trying to get the sucker off, but it has a keyed bolt i have to match. In the meantime, just looking to try and match so of your mileage numbers. Or get anywhere close. If I could I'd be thrilled with my foray back into these great little cars-- as is i'm pretty stressed and perplexed.

      Thanks!

    6. Member MK5golf's Avatar
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      08-13-2012 10:57 AM #231
      um, 12MPG? You have a serious problem. Are you sure your calculating properly? Roof rack negatively impacts your mpgs for sure, but unless your redlining all day everyday I think it would even be hard to get 12 mpgs.
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      08-13-2012 02:49 PM #232
      Yep that's why I'm stressed. And no, I drive like a granny. Granted all city so a lot of starting and stopping but still. I got 163 miles on 13.5 gallons. Any other way to calculate that?

      Any suggestions other than I must be doing something wrong (or even pointing out if I am doing something wrong-- would rather be wrong than be getting just over 150 miles on 1 tank) would be greatly appreciated.

    8. Junior Member Zoolook_'s Avatar
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      08-13-2012 04:17 PM #233
      Quote Originally Posted by tiffanyrogers View Post
      Yep that's why I'm stressed. And no, I drive like a granny. Granted all city so a lot of starting and stopping but still. I got 163 miles on 13.5 gallons. Any other way to calculate that?

      Any suggestions other than I must be doing something wrong (or even pointing out if I am doing something wrong-- would rather be wrong than be getting just over 150 miles on 1 tank) would be greatly appreciated.
      Take it in for a tune... at that kind of mileage, you must be literally leaking gas. Does the 2007 model have a trip computer? What does that read as you're driving along? It could be the mixture is much too rich - does it ever stall?

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      08-13-2012 04:31 PM #234
      Thanks Zoo. Yes will def take it in. From everything I've read here it seems way out of the norm, even accounting for the roof rack. It was just at a mechanic 3 weeks ago for the prebuy look over and all they suggested was a new battery. Also passed state inspection last week- but something definitely isn't right.

      It doesn't have a trip computer. Also, I will note that the terrible mileage was throughout the tank-- meaning it seemed consistently bad. Don't know if it was leaking fuel if I would come back to it having taken a big dip on the gauge (it sits idle usually for a day or 2 at a time).

    10. Junior Member Zoolook_'s Avatar
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      08-13-2012 05:06 PM #235
      Is there any carbon build up in the exhaust? Black residue?

    11. Member MK5golf's Avatar
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      08-13-2012 08:31 PM #236
      I think its a leak too. 12 MPG could only have one cause....
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      08-13-2012 10:27 PM #237
      check your spark plugs... either you're not running on all cylinders... your maf is messed up... tires are flat. But most you would get a CEL.
      C2 tune, Peloquin LSD, .717 TDI 5TH gear swap, AWE exhaust, BSH CAI, H&R street sport coilover + 25mm RSB, neuspeed short shifter, 17x8 BBS RGR.

    13. Member A1an's Avatar
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      08-14-2012 10:55 AM #238
      Damn. How many miles are on the Rabbit? Any idea if it was ever serviced? I noticed a nice little boost with the regular spark plug change interval on my Rabbit so I can imagine if that was neglected for a long time the car could run like crap. What about the air filter? Do you ever smell gas? Does it have a really rough idle?

    14. Member magics5rip's Avatar
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      08-14-2012 11:59 AM #239
      If you were leaking fuel, you would smell it or be able to spot puddles of it while the car is sitting still. I would rule that out.

      Depending on mileage it could be a combination of many things. I would start with: new plugs, new synthetic oil (0w40 Mobil1 is my choice), new air filter. I am suspecting that one of your O2 sensors might be going bad but has yet to throw a CEL. When these go bad, cars tend to run a little rich since the ECU loses the ability to monitor the air/fuel mixture accurately.

      How does the car FEEL when you drive? Sluggish? Running rough?

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      08-14-2012 12:04 PM #240
      Car runs great- it seems. No discernable problems- only thing i've notice is twice while i was driving the brake pad light (the one that looks like a setting sun with dashes around it) came on but went back off. The original owner had the brake pads and rotars replaced this January. The car does have a lot of miles on it, 93k- have a partial service record and it was serviced as recently as this summer and seems to have been at regular intervals before.

      took it in this morning. Mechanic said these cars aren't great with gas but i'll look-- told him i had asked many other owners of the same car and they said something was definitely amiss. Anyway, he didn't find anything. O2 sensor, fuel filter, brakes, etc all look good.

      He took off the roof rack, will ask about the tire pressure. Wondering if doing all city driving with AC on with roof rack and maybe low tires would make that big a difference. Seriously driving pretty darn granny though. I wish there was something wrong with it that I could point to. Environmental factors alone don't seem to add up and I REALLY don't want to be stuck with sh*tty mileage in the city, since that's my main use for the car. Was prepared for the 19 EPA est, but not 12.

      Thanks to everyone who has weighed in.

    16. Member magics5rip's Avatar
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      08-14-2012 12:25 PM #241
      Quote Originally Posted by tiffanyrogers View Post

      Thanks to everyone who has weighed in.
      Have you tried any highway driving? It would be interesting to benchmark the mileage against what you see with the city driving. I have personally never dipped below 23 MPG in my 06.5 Rabbit...

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      08-14-2012 01:49 PM #242
      How do I get MPG to show on my cars dash? 08 rabbit.

    18. Junior Member PaulGiz's Avatar
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      08-14-2012 02:23 PM #243
      Quote Originally Posted by tiffanyrogers View Post
      Car runs great- it seems. No discernable problems- only thing i've notice is twice while i was driving the brake pad light (the one that looks like a setting sun with dashes around it) came on but went back off. The original owner had the brake pads and rotars replaced this January. The car does have a lot of miles on it, 93k- have a partial service record and it was serviced as recently as this summer and seems to have been at regular intervals before.

      took it in this morning. Mechanic said these cars aren't great with gas but i'll look-- told him i had asked many other owners of the same car and they said something was definitely amiss. Anyway, he didn't find anything. O2 sensor, fuel filter, brakes, etc all look good.

      He took off the roof rack, will ask about the tire pressure. Wondering if doing all city driving with AC on with roof rack and maybe low tires would make that big a difference. Seriously driving pretty darn granny though. I wish there was something wrong with it that I could point to. Environmental factors alone don't seem to add up and I REALLY don't want to be stuck with sh*tty mileage in the city, since that's my main use for the car. Was prepared for the 19 EPA est, but not 12.

      Thanks to everyone who has weighed in.
      Since the brakes were recently done, do this.

      After a drive, put your hand near the brake rotors. Are any glowing? Do you smell or feel excessive heat? Perhaps you have a sticking or cocked pad, or your parking brake is misadjusted. Dragging brake could kill your economy real fast.

      P.
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      2012 2-door Golf 2.5L, Convenience Pkg., Dead Stock (for now)

    19. Member A1an's Avatar
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      08-14-2012 03:35 PM #244
      Good call on the potential dragging brakes.


      If there are no specific documents for the air filter, spark plugs, etc then I would do that ASAP. Double check that the coil recall was done on the car too. If it hasn't get that done at the dealer (should be free). I would imagine if one or more weren't operating correctly that you would get a check engine light, but you never know.

      Roof rack plus low tires wouldn't cause that sort of dip. I've been running a rack on my 07 Rabbit for five years now and we average around 26-27 in mixed driving.

    20. Member TylerO28's Avatar
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      08-14-2012 03:49 PM #245
      Quote Originally Posted by Nick_V08 View Post
      How do I get MPG to show on my cars dash? 08 rabbit.
      Do you have a mfd display? Some of us were lucky to get the 08 Rabbit with mfd. Others not so much... For my 08 i have the mfd display and my window wiper stalk has a little flipper switch on its end like the cruise control stalk. If you push that up or down, you'll be able to scroll through your mfd options.

      Sent from the bottomless pits of HELL!
      god i love my car. it may not be fast, but it's crazy fun!



      C2 stage 2 TURBO!!! ACHTUNG!!! 2.5liter 5cylinder contents under pressure!!!

    21. Member TylerO28's Avatar
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      08-14-2012 03:51 PM #246
      this is what the mfd screen looks like fyi

      Sent from the bottomless pits of HELL!
      god i love my car. it may not be fast, but it's crazy fun!



      C2 stage 2 TURBO!!! ACHTUNG!!! 2.5liter 5cylinder contents under pressure!!!

    22. Member thygreyt's Avatar
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      08-15-2012 12:42 AM #247
      12 MPG?

      i get more that when driving on 6000 RPMS for 3 hours... which is when i'm playng on mountains

      100% sure that there is something wrong.

    23. Member
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      08-15-2012 02:36 AM #248
      Quote Originally Posted by TylerO28 View Post
      Do you have a mfd display? Some of us were lucky to get the 08 Rabbit with mfd. Others not so much... For my 08 i have the mfd display and my window wiper stalk has a little flipper switch on its end like the cruise control stalk. If you push that up or down, you'll be able to scroll through your mfd options.

      Sent from the bottomless pits of HELL!
      Yes I do and I figured it out, my next question is..on the remaining fuel in tank option or the MPG thing, how can the MPG thing keep a stable number? when im driving its going up and down constantly and not giving me more a consistant number.. yes i know there is another mpg deal..but it doesnt seem quite accurate to me. and the remaining fuel in tank option be more ''true''..like it only goes down every 5 gallons like when i only drive like 2 miles, which doesnt make sense.
      Last edited by Nick_V08; 08-15-2012 at 02:40 AM.

    24. Member TylerO28's Avatar
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      08-15-2012 02:49 AM #249
      Quote Originally Posted by Nick_V08 View Post
      Yes I do and I figured it out, my next question is..on the remaining fuel in tank option or the MPG thing, how can the MPG thing keep a stable number? when im driving its going up and down constantly and not giving me more a consistant number.. yes i know there is another mpg deal..but it doesnt seem quite accurate to me. and the remaining fuel in tank option be more ''true''..like it only goes down every 5 gallons like when i only drive like 2 miles, which doesnt make sense.
      It only functions in 5 gallon increments

      Sent from the bottomless pits of HELL!
      god i love my car. it may not be fast, but it's crazy fun!



      C2 stage 2 TURBO!!! ACHTUNG!!! 2.5liter 5cylinder contents under pressure!!!

    25. Member magics5rip's Avatar
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      08-15-2012 09:53 AM #250
      Quote Originally Posted by thygreyt View Post

      100% sure that there is something wrong.
      There has to be a piano strapped to the roof. Maybe the unibody was stuffed with lead?

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