2.5L Fuel economy thread.--UNOFFICIAL--

[TylerO28]

this is what the mfd screen looks like fyi

Sent from the bottomless pits of HELL!

[thygreyt]

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.

[Nick_V08]

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.

[TylerO28]

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!

[magics5rip]

100% sure that there is something wrong.

There has to be a piano strapped to the roof. Maybe the unibody was stuffed with lead?

[thygreyt]

There has to be a piano strapped to the roof. Maybe the unibody was stuffed with lead?

This.. and maybe you have some more leqd on your tires...

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[tiffanyrogers]

Haven't done any highway driving yet, but am also obviously interested to see those numbers. Mechanic yesterday checked the brakes, said it had new air filter, fuel filter, spark plugs, etc. Said looks like a lot of those things had been replaced, perhaps in anticipation of the sale of the car. Said it could be a failing O2 sensor that isn't throw codes yet, but that it would be expensive to try it just to see ($240 and there are 3?).

Yeah I am just driving around watching the gas gauge in fear now. Totally sucks. Will try to see if the brakes are hot- but the mechanic dude swore they were fine.

Anyway, thanks again... If anyone thinks of anything else.

Oh yeah and this is with just me (a 130 lb gal) in the car and occasionally a bag of groceries. No pianos or walruses or anything.

[tiffanyrogers]

Oh and coil recall was done it looks like on the service record. If I don't have documentation of the fuel filter and spark plugs being replaced (just mechanic saying they look new) should I try having that replaced. Get a 2nd opinion?

Since I am only working with one tank of data i won't panic just yet. I'm at the same time relieved and frustrated that everyone is getting such good mileage. Relieved because at first I thought it was just the "new" 2.5L engine. Frustrated because i am jealous and hope I ever see those types of numbers.

[Nick_V08]

I think my MPG is screwed up. Last week I finally got my maf insert put in for my neuspeed pflo, and when I installed I cleaned my maf sensor with maf cleaner, and unplugged my battery to reset the cel that was being caused by the pflo. Put everything back together etc, cel is gone for good from that, but it seems like my gas mileage is messed. Should I get some fuel additive cleaner and use it when my tank is quite low to help? Or what else could the problem be? Tires are right psi, only other mod to car ATM is full custom magnaflow catback exhaust (same as kit)

Could it be fuel filter? Maybe spark plugs? Even tho I doubt it could be those.. Car starts up quick, no hesitation etc.. Not sure what's going on.

Maybe give the computer time to re calculate itself with the maf insert in and the cel finally being gone? Or scan for any possible codes and erase them? Im not sure.

Any and all help works!

Car: 08 rabbit 2dr, 5speed. 55k miles, only shell gas goes in my car.

[thygreyt]

lol...

[magics5rip]

Oh and coil recall was done it looks like on the service record. If I don't have documentation of the fuel filter and spark plugs being replaced (just mechanic saying they look new) should I try having that replaced. Get a 2nd opinion?

Since I am only working with one tank of data i won't panic just yet. I'm at the same time relieved and frustrated that everyone is getting such good mileage. Relieved because at first I thought it was just the "new" 2.5L engine. Frustrated because i am jealous and hope I ever see those types of numbers.

Right, more data is also a good place to start. If you can repeat this over two tanks then there is a problem. However, the gas gauge in our cars likes to work like this as well:

1st 25% - AWESOME (usually 130 miles for me)
2nd 25% - Still pretty great (220 miles total, 90 miles this quarter)
3rd 25% - This isn't so efficent...(275 miles total, 55 miles this quarter)
4th 25% - Did a black hole appear in my fuel tank? (330 miles total till light comes on, 55 miles this 12.5%)

For my typical driving, this averages to 25.4 MPG over 13 gallons. Probably a 30% city/70% hwy mix.

[thygreyt]

my numbers:

1/4: 125

1/2: 220

3/4: 300

Tank: 360

27.5 mpg average.

@65mph (2500 RPM) i get 34 mpg... and it gets better if i go slower... i just cant do it! lol.

[Anile_eight]

my numbers:

@65mph (2500 RPM) i get 34 mpg... and it gets better if i go slower... i just cant do it! lol.

I completely agree! If i do 77 then I get about 30-31 mpg... If I do 70 I get 34-35mpg. ( am at 7550-7600 RPM @ 70)

[magics5rip]

my numbers:

1/4: 125

1/2: 220

3/4: 300

Tank: 360

27.5 mpg average.

@65mph (2500 RPM) i get 34 mpg... and it gets better if i go slower... i just cant do it! lol.

I'm rarely below 70 mph on the hwy and thats at roughly 3000 RPM. A TDI 5th probably would put me down near 2600. Being that I've done 31mpg HWY @ 70-75mph, I think i can get close to your 34mpg with a TDI 5th!

[thygreyt]

on the past, i was RARELY under 90... but thr police didnt like it... 2 tikets in one month, and now (since) i'm rarely OVER 70 (speed limit).. and i found that the bonus of NO tickets was GREAT MPG.

btw, at 90 i get ~27 mpg! not bad...

[Anile_eight]

btw, at 90 i get ~27 mpg! not bad...

not to shabby no lol.

[tiffanyrogers]

thanks magic- but those numbers make me want to cry. i was def at 80 miles when i hit 1/2 a tank last time. then 125 at 3/4 and 163 at empty. at least my gauge is consistent. consistently terrible. i don't drive much so it may take a while (even at this burn rate) to have another tank of data, but will update. thanks again.

[thygreyt]

Today, on the hwy the limit was 55 so i did 60.. Wow!! Currently i have 360 miles and 1/4 left...i get 37 mpg at 60.... Its ridiculously aweseome

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[magics5rip]

Today, on the hwy the limit was 55 so i did 60.. Wow!! Currently i have 360 miles and 1/4 left...i get 37 mpg at 60.... Its ridiculously aweseome

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37mpg may worth the SRI price and software update afterall...

[thygreyt]

The thing is that i dont know how much the sri is helping milage and how much is the tranny... But the combination is pretty impressive

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[A1an]

Right now I'm sitting at 310 miles with a quarter tank left. This was with highway driving making sure I stayed under the 3k mark. Going to finish out the tank but I doubt I'll get much better than my usual 320-340 before needing to fill up.

[magics5rip]

Right now I'm sitting at 310 miles with a quarter tank left. This was with highway driving making sure I stayed under the 3k mark. Going to finish out the tank but I doubt I'll get much better than my usual 320-340 before needing to fill up.

Any mods?

[Anile_eight]

The thing is that i dont know how much the sri is helping milage and how much is the tranny... But the combination is pretty impressive

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I have noticed the exact same thing with the tdi 5th... It's nuts, when I'm doing 50 torque says I get mid 40s. I have not have a trip at 60 long enough to get a good number there though. But I would expect nothing less then that.

[PaulGiz]

I have noticed the exact same thing with the tdi 5th... It's nuts, when I'm doing 50 torque says I get mid 40s. I have not have a trip at 60 long enough to get a good number there though. But I would expect nothing less then that.

This motor has good torque and high gearing works well. That's why VW gave us post '11 drivers a .66 5th gear with higher final drive.

2500 miles, average tanks still all over 30 (range 31-35) with mostly hwy and rural driving.

Nice, especially since there's good pulling power when you need it (unlike most of the competition, I'm looking at you, Civic!!).

P.

[Anile_eight]

This motor has good torque and high gearing works well. That's why VW gave us post '11 drivers a .66 5th gear with higher final drive.

2500 miles, average tanks still all over 30 (range 31-35) with mostly hwy and rural driving.

Nice, especially since there's good pulling power when you need it (unlike most of the competition, I'm looking at you, Civic!!).

P.

Haha, yeah. I agree with the torque part. I noticed that today on my trip from home to PA with all the hills I only had to downshift a couple times....

On the first leg I got 37mpg most around 55-60mph. The second leg probably didn't go as well since there was heavy rain and people were driving slow. Plus I hit more towns... We'll see.

[A1an]

Any mods?

No but I do have aerodynamics working against me with the roof rack. Maintenance is all up to date on the car as well.


I've gone through about 6-8 tanks of premium in the car and even tamed down my highway driving to keep it cruising under 3k. I still can't break out of the 26mpg zone which is pretty sad considering our 2010 Tiguan auto averaged 24 on the last tank. Calling it quits on the premium gas experiment.

[magics5rip]

No but I do have aerodynamics working against me with the roof rack. Maintenance is all up to date on the car as well.


I've gone through about 6-8 tanks of premium in the car and even tamed down my highway driving to keep it cruising under 3k. I still can't break out of the 26mpg zone which is pretty sad considering our 2010 Tiguan auto averaged 24 on the last tank. Calling it quits on the premium gas experiment.

Roof racks will kill your economy but on that note, premium fuel won't raise your economy (much either.) The engine runs a little smoother and you might have a touch more power but your economy will remain the same (at least that was my conclusion after trying the same experiment.)

[Anile_eight]

Today, on the hwy the limit was 55 so i did 60.. Wow!! Currently i have 360 miles and 1/4 left...i get 37 mpg at 60.... Its ridiculously aweseome

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I got my 37mpg tank the other day taking the back roads from home through NY and PA. I was doing 65mph for the first 1.75 hrs then a slow 20 minutes at the border waiting to get to the Nexus line (I talked to the border agent for 5 seconds and I left). Then the next 3 hrs I did between 55-60mph through back roads and little towns etc. So ideally it would have been better but I can't complain with that. I do want to see if I can find a place to literally just cruise forever between 55-60mph and see what I get then. I love this TDI 5th gear.

Something I did notice when I was looking at torque on the interstate while going through north FL. I have following a dodge ram which was following a mid size RV. When I got into the draft I saw my mpg jump by about ~5 from 32/33 to 37/39. I was not up his ass but I was closer then I would like. So I only did that for a couple minutes to confirm it wasn't a glitch lol.

Fuelly info: https://www.fuelly.com/driver/anile8/jetta?fu=2867657

[A1an]

Roof racks will kill your economy but on that note, premium fuel won't raise your economy (much either.) The engine runs a little smoother and you might have a touch more power but your economy will remain the same (at least that was my conclusion after trying the same experiment.)

I tried the premium fuel experiment after reading that article with dyno results on a 2.5 Jetta. Apparently there was a 1-2 mpg increase along with the minor hp increase and smoother running motor. While I realize the hp increase prob couldn't be felt, my motor wasn't running any smoother. It was worth a shot I guess.

Right now I am thinking about ditching the roof rack but I think the cost of the switch will outweigh the benefit for at least 2-3 years. Looking at about $600-650ish for the hitch and the carrier that I want to use. Guessing the increase in gas mileage will save me maybe 40-50 gallons of fuel a year. So even at $5/gal I'm still looking at about $250 saved in a year. But on the positive side I can buy a hitch for my wife's Tiguan for $80 and be able to haul bikes with both our vehicles.

[MK5golf]

KK so I just did a tank, 27 mpgs, mixed driving, 120 km/h when on highway, ac wasnt off once. I have carbonio and unitronic chip. Ive noticed a 2-3 mpg improvement since chip.

[PhAyzoN]

Just filled up 2 days ago. Worst tank I've ever had by far... 24.5MPG. Not really sure why, probably drove it hard more frequently than I would've liked. Was also due for an oil change. Now that that's taken care of I'll see what this tank brings.

[wetheitalians]

just got all 4 wheel bearings/hubs replaced, the cat converter, oil change with filter, throttle body cleaned, new plugs, new coil packs, new air filter ( CAI ), new fuel filter, tires properly inflated, and i sea foamed her before the oil change...gonna fill with premium and drive her til cut off (road trip with spare tank in the trunk) hoping this will be a longggg tank of gas...lol ill keep u guys posted!

oh p.s 06 jetta 5spd

[thygreyt]

doing 12 launches, and ~30 miles of spirited driving.. and still i got 390 miles to the tank, with a 28.4 MPG.

mixed city hwy driving.

[A1an]

^ I hate you.

[Gott ist gut]

just got all 4 wheel bearings/hubs replaced, the cat converter, oil change with filter, throttle body cleaned, new plugs, new coil packs, new air filter ( CAI ), new fuel filter, tires properly inflated, and i sea foamed her before the oil change...gonna fill with premium and drive her til cut off (road trip with spare tank in the trunk) hoping this will be a longggg tank of gas...lol ill keep u guys posted!

oh p.s 06 jetta 5spd

If you're gonna run her dry, maybe you should consider emptying the tank to remove any possible particles in the tank.

for research

oh, and clean the MAF.