Mods to increase MPG

[CTNogaroS4]

Currently driving B8.5 A4 2.0T. Looking for what mods I can do to increase MPG.


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[MugelloB7RS4]

I would have suspected that you would have been getting decent fuel mileage numbers now.

Try skinnier tires. Or ones with less rolling resistance. Or both

You can try adding pressure to your tires, but keep in mind that may cause them to wear prematurely in the middle

Be smooth with the throttle pedal, pretend there's an egg under it and you can't break it ever.

Some people report better mileage with a software tune, but you have to make sure you're disciplined enough to not be in boost all the time otherwise you will have the opposite effect for fuel economy.

[JeriQo]

K&N dry filter - the OEM ones are too restrictive.
Snow screen delete.

[CTNogaroS4]

Any other mods help increase highway mpg????


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[Jet08]

Weight reduction, remove unnecessary items from your trunk, agree always have tires at correct pressure or +2 psi max, tunes do improve efficiency and therefore have the potential to give better gas mileage remove any roof carry racks.

[Skyler@Achtuning]

A good alignment will help a bit, the factory alignments are sloppy. You'll want to go to a specialty European alignment shop (not Sears or Firestone) to have this done, expect the cost to be about $150 +/- 30-ish. In theory lowering the car will reduce the effective frontal area though I've never seen any real testing done on the true aerodynamic / MPG benefits of this. Look into hypermiling as well to get some ideas though I honestly can't recommend some methods people use as they seem unsafe to me.

[audrobotic]

There really arent any mods to increase MPG. There are best practices. There’s no magic bullet.

[Project Quattro]

Mine did slightly better after I tuned it. The extra power allowed me to run one gear higher (car was 6MT) a lot of the time to keep revs down. Obviously at a 5% MPG increase it'd take a looooong time to see any ROI on that, but figured I'd mention it.


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[BrewDude]

Spark plugs. Check the gap and change as required.

I thought I had intake carbon buildup (which I probably do at 90k miles), but changed out plugs and it's been a night and day difference with mileage. Wasn't even getting close to what the MFA was computing for mileage after fill ups.

Checked my plugs on a whim and the gap was close to .40. New set of NGK Iridiums gapped to .28 fixed that.

[CTNogaroS4]

How accurate does anyone think the MFA is for reading actual MPG?

[Jet08]

Accurate I check against actual when I fill with gas and reset the trip metre.

[K__bz]

interesting thread so far.
I have also been wondering as I think my Avant is gulping a bit too much gas for stock... 12L/100km averaging.

I just ordered some NGK Plugs which ill be gapping at 0.28 and installing. hoping this will help.

Also been thinking about a tune from ECU tuning group.
Still undecided.

Going to look into the above mentioned K&N Dry filter.

[Spawne32]

K&N dry filter - the OEM ones are too restrictive.
Snow screen delete.

More air requires more fuel my man, i saw a 1mpg drop after I did that.

[Jet08]

I remember reading somewhere that the standard intake on the EA133 and EA388 series was pretty good, obviously a cone filter pod is going to flow more but that is related to surface area and the acoustic properties of the standard intake required to meet Euro standards

[BrianVan]

What are everyones MPG or even miles per tank? My computer always states 390 after a fill up, (450 when first purchased when it was 3 years old. I have a MY 2013 A4) but I'm getting around 275 or even 250. Which at 13.5 gallons per fill up, is horrible at around 18-19 mpg. The computer also stating the same. I don't drive hard ALL the time, but even some spirited driving shouldn't lower it that much from what the sticker states of over 25mpg. I even tried to grandma drive it a tank and didn't get much better. I was all zero traffic smooth highway for 25 miles each way, and now 7 miles on 35-45 mph roads with minimal stop and go, if any at all.
I've got an open dry filter, changed plugs and coils this past Spring. Idles dead smooth. Would a plug gap of .28 to.30 make THAT big a difference in MPG you think? Im at 65k miles now. Pulls hard, little hesitation bump from 2-3k. Pretty disappointed in the mpg on a 4 banger turbo.
Maybe simply cleaning the MAF would help...

[ILVTRANCE]

What are everyones MPG or even miles per tank? My computer always states 390 after a fill up, (450 when first purchased when it was 3 years old. I have a MY 2013 A4) but I'm getting around 275 or even 250. Which at 13.5 gallons per fill up, is horrible at around 18-19 mpg. The computer also stating the same. I don't drive hard ALL the time, but even some spirited driving shouldn't lower it that much from what the sticker states of over 25mpg. I even tried to grandma drive it a tank and didn't get much better. I was all zero traffic smooth highway for 25 miles each way, and now 7 miles on 35-45 mph roads with minimal stop and go, if any at all.
I've got an open dry filter, changed plugs and coils this past Spring. Idles dead smooth. Would a plug gap of .28 to.30 make THAT big a difference in MPG you think? Im at 65k miles now. Pulls hard, little hesitation bump from 2-3k. Pretty disappointed in the mpg on a 4 banger turbo.
Maybe simply cleaning the MAF would help...

depends on temperature and how much gas they squeeze in. It varies from 360-390 on mine

[SDF1]

A4 2.0T with no mods does AMAZING on highway. I can almost do 700km (440miles) on a full tank if it's 100% highway. If I'm in city/traffic I'm lucky to hit 360km (225miles). The car is just too damn heavy! You can't mod that out of it...lol

[Smac770]

Currently using summer gas, so the numbers are a little better. But I'll get 410-420. More after a Quik-Trip tank, less after a BP tank (but seems to be a problem with the local BP, not other BPs I've hit).
My target of "things are fine" is nearing 300 miles by time I hit quarter tank. But note that even daily driving is long trips for me. It's 5 miles to the nearest anything, and 9 miles to the Wal-mart and 10 miles to a grocery store.
You might do some logging to see how your fuel trims are and the fuel consumption to see if what the engine thinks it's doing is matching your results. Maybe you have a fuel leak somewhere. Maybe the engine has bad data such as a MAF or O2 sensor problem and is overusing fuel.
Check your tire tread, tire pressure, tire alignment. Any variation there will impact the numbers easily.

I reset my trip odometer each fill up. My "miles remaining + trip odometer" stays pretty steady. It does go down as the tank is consumed, from say 420 on fill up to maybe 380 by time I make 1/4 tank (with maybe 280 to 300 on the trip odometer). 1/4 tank fill up is usually right around 12-12.5 gal fill up.

I did notice some improvement in my idle consumption when I helicoiled two of the bolt holes on the PCV. When I replaced it when I replaced my turbo, I noticed bolts 1 and 2 would not torque. Even just 5 Nm, they would just spin. Not sure what the dealership messed up when they replaced it the previous time when they did the oil consumption work. But I left it as is (they seemed to work to hand tight, just couldn't torque them any) for a year until I finally fixed them. Now they are torqued to 11 Nm like they should.

That you're getting 390 on fill up, your car seems to think you're getting good mileage. That you're not breaking 300 on a tank, you have to be losing fuel somewhere. Otherwise, the car should know your mileage sucks and not be setting miles remaining so high on fill up.

[Finder]

Any other mods help increase highway mpg????


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A lighter foot helps..

[JeriQo]

More air requires more fuel my man, i saw a 1mpg drop after I did that.

hmmm.. im thinking the opposite. ive been under the impression since my gran turismo 2 days that with better air flow, +hp and better mpg.

[DetRebel]

hmmm.. im thinking the opposite. ive been under the impression since my gran turismo 2 days that with better air flow, +hp and better mpg.

GT2! The good ol’ days... PS4 needs a new full version of GT


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[BrianVan]

A4 2.0T with no mods does AMAZING on highway. I can almost do 700km (440miles) on a full tank if it's 100% highway. If I'm in city/traffic I'm lucky to hit 360km (225miles). The car is just too damn heavy! You can't mod that out of it...lol

Holy heck...over 400!!!! I think I broke 300 ONCE, and my "remaining miles" stated 5. Even all highway at 25 miles with ZERO traffic, it never broke 300 miles a tank. If a fuel leak, ,wouldn't I smell it? I'll check the PVC valve and the MAF this weekend. Hopefully is coated in dirt and that's the problem. Thanks for the tips and confirming my MPG is in the toilet. LOL.

[19birel]

Make sure that when you're cruising at highway speed to use the minimal amount of throttle input required to maintain your speed and anticipate hills. When I had my 5series I did that and managed to get 31.5mpg (the car was only rated to 27mpg) highway and that car weighed as much as the A4 but had a thirstier 3litre inline-six. You don't have to drive slow either, I achieved those figures doing a consistent 75-80mph

[Spawne32]

hmmm.. im thinking the opposite. ive been under the impression since my gran turismo 2 days that with better air flow, +hp and better mpg.

lmao or one of these

[Smac770]

Another thing to check too if you've lost mileage over time is the gap between the intercooler and the radiator. I used to make the 375 mile run to mom's with a quarter tank left (450 or so would be the miles remaining on fill up) but had the last year or two been well into the orange light to finish the trip (and maybe making 400 miles remaining on the fill up). I removed the intercooler for other reasons and saw a good 1/3 of the area behind it was completely blocked by debris. Cleaned all that out and mileage was back up to normal. You can see that gap from above with the lock carrier cover removed, but it's much easier to get to for cleaning if you remove the nose undercover at the bottom of the lock carrier. Or remove the intercooler for the easiest access. I also noticed that the left air guide that sits along the radiators under the bumper cover was gone. Guess it was too much for some dealer tech to put back when they did rings.

[kingofnyc]

Tdi swap

[Novarider]

I get about 300 miles per tank. Average about 21mpg regular/city driving and I get about 26mpg highway but I set the cruise at 90mph so I'm using more fuel than if I set it at 75.

[Spawne32]

How is 300 miles per tank equating to 21mpg city?

[Smac770]

300/21 = 14.3 gallons, or filling up just after the orange light comes on, I would imagine.

[Novarider]

300/21 = 14.3 gallons, or filling up just after the orange light comes on, I would imagine.

Yep. Tho it might be closer to 20mpg as I typically get about 15 gallons per fill up.

[Spawne32]

Right, but our gas tanks don't hold 14.3 gallons, they hold 16.9 gallons. That means hes getting roughly 17mpg.

[Novarider]

Right, but our gas tanks don't hold 14.3 gallons, they hold 16.9 gallons. That means hes getting roughly 17mpg.

When the light comes on I get gas. Usually takes 15 gallons. I don't normally run it to E

[Spawne32]

When the light comes on I get gas. Usually takes 15 gallons. I don't normally run it to E

yeh when you hit E or the please refuel now, there is 1.5 gallons there about beyond that before it goes empty

[Spawne32]

Correct way to do the current MPG is to refuel to the top, reset the odometer, drive for a while, then when you go to refill, divide the number of miles traveled by the amount of gallons that it took to fill to the top again. So for instance I believe on my last fill up i had driven 180 miles and took 9.4 gallons to fill to the top. 180/9.4= 19.1 mpg

[Novarider]

yeh when you hit E or the please refuel now, there is 1.5 gallons there about beyond that before it goes empty

I'm aware of the 2 gallon "reserve" and I have used it a couple times.

[SDF1]

If you do not want to be tempted to waste hours of your time do not read what I'm going to write below :P

You can correct your DIS consumption
http://audienthusiasts.com/VagComDIS.html
A few years back I had made an excel sheet and adjusted mine to be very accurate.

[Gee4really]

IMG_7997.jpg



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[Theiceman]

Correct way to do the current MPG is to refuel to the top, reset the odometer, drive for a while, then when you go to refill, divide the number of miles traveled by the amount of gallons that it took to fill to the top again. So for instance I believe on my last fill up i had driven 180 miles and took 9.4 gallons to fill to the top. 180/9.4= 19.1 mpg

Actually this is a very good way to do it. The longer the period the better. You can do it over days weeks ir months.
Just fill to the top as mentioned. After that you don’t have to during test period. Just reset odometer at beginning and keep all receipts. On your last one fill to the top again as mentioned. Now you have total gas used off receipts and total miles.

BTW. Doubt there would be mods for gas milage. manufacturers are under intense pressure from government agencies for maximum efficiency. The car even tells you how to drive for maximum efficiency . If there was a mod or magic bullet, Audi would be using it.
Key. Stay off the turbo .... but whats the point , may as well buy a Prius


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[Polski_beaver]

2013 allroad with 74k on it 475 miles before the gas light came on! cruise control at 70-75mph in 8th gear manual mode

[LGHT]

Start using Torco for a few tanks then stop you will notice an increase, but keep in mind torco aint cheap.