Mine also. Display shows 5.8 L/100Km but actually is near 9L /100Km.

 

Are you checking “since reset” or “since refuel”? If checking “since reset”, that’s an average from potentially thousands of miles. So one bad/low fuel efficiency trip won’t change the average more than a few tenths. If checking “since refuel”, then it’s an average since you’ve refueled more than 10L I believe.

 

Mine is since refuel. I think there is a way to adjust displayed fuel consumption using vcds.

 

No idea what that translates to in American but I can assure you the Volkswagen meters aren't super accurate. Do the calculations by hand.

 

Did the math, seems fuel economy is 14.75mpg or 16L/100km

Does that seem correct?

 

That seems ABOUT correct, depending on how fast you were going. If you were going 80mph I could see that being accurate

 

It’s rated for around 20mpg highway, so your saying it being almost 30% less efficient than what it’s rated for seems correct?

 

Try to clean the MAF sensor, change air filter, run some injector cleaner..maybe it helps a little.

 

Look at fuelly and filter by v6 engine 3.2 or 3.6. that mpg is right on track for what's normal

Volkswagen Touareg MPG - Actual MPG from 935 Volkswagen Touareg owners

The most accurate Volkswagen Touareg MPG estimates based on real world results of 23.8 million miles driven in 935 Volkswagen Touaregs

www.fuelly.com

 

Middle teens for a gasser doing normal things is about what you should get. Tons of things will change that either way depending on how you drive and if most is highway or local traffic,flat terrain or mountains ,warm weather or cold etc.

 

This is really unfortunate... thought I did my research, looked at these for months. Talked to other people who had v6 who said they got around the desired mpg.

Damn. What a let down.

 

It's a 5000lb brick with a massive overbuilt transmission and AWD system.

How fast are you traveling to get that economy? You're running premium fuel?

Might try new spark plugs with proper gap, run seafoam through the vacuum system then another can through the fuel tank. Check the air filter, make sure it's a good one and that it's clean. Clean the maf sensor. Run vagcom scan for errors

 

How many miles a year do you travel?

How much do you pay for your fuel?

What's the cost difference per annum between the mpg you thought you'd get and your actual mpg?

 

Honestly, I purchased the car mostly for road trip purposes. So annual mileage wasn’t a huge deciding factor. My previous car I did 50k kms over a 4 year period so not a lot of driving.

Factors I took into consideration with this vehicle was size, wanted some large to carry all equipment. Something with average fuel efficiency for the size, which I expected to be around 20mpg highway driving, as I wanted it for road trips, lastly I wanted something that was comfortable for long trips.

The trip I just did, which we didn’t even have anything in the car, just some overnight clothes, ended up being 14.75mpg. Highway for 95% of the trip, cruise set at 120km/h the whole way with no traffic. Not ideal, was expecting around1000km range highway, not 700km.