Brand New A6 3.0TDI MPG trouble
Brand New A6 3.0TDI MPG trouble
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Discussion

KR

Original Poster:

183 posts

260 months

Monday 15th March 2010
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Just picked up a new A6 3.0 TDI Quattro, bought this as it was going to be more fuel efficent than my RR Sport. Audi say it should do approx 40mpg. I've done 500 miles in 5 days and its averaging 27 mpg, and I'm driving it very sensibly. Anyone got any idea's??

Simond001

4,519 posts

308 months

Monday 15th March 2010
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about the same as my A4 3.0 TDI quattro. Gets up to high 30's on a trip though.


Burba

1,870 posts

288 months

Monday 15th March 2010
quotequote all
takes time to bed in?

gizlaroc

17,251 posts

255 months

Monday 15th March 2010
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I had one for a week recently, well an A5 3.0tdi, and it returned 32mpg over the week and 500 miles. I was pretty amazed as my 3.2 petrol A6 avant returns around 31mpg doing the same journeys.

What was even more amazing was the diesel was returning less than my petrol on sub 10 mile journeys from cold.


They do get better though, mate has one and he averaged under 30 for the first 10k miles, by 30k miles he was showing 33mpg and now at 90k miles he is at 36mpg.


Dilligaf10

2,431 posts

241 months

Monday 15th March 2010
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Economy will improve by about 10k miles, engine is still new and needs time to bed in. Get 40+ on a run in my A8L

Tame Technician

2,467 posts

235 months

Monday 15th March 2010
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Typically see mid 30's on customers A6's - 2.7 and 3.0TDI.

But it really depends how you drive it, auto gearbox will rob you of 2 or 3.

Try driving it arround for a few days with the instant consumption on the display, help you realise when your using more fuel.


james S

1,620 posts

276 months

Tuesday 16th March 2010
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A typically get around 28-30 in town 33 in mixed drving and 40 on a run. Long term average is 34. Its an A8 3.0tdi

Raven Flyer

1,645 posts

255 months

Tuesday 16th March 2010
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I have an A6 Quattro Tip and my commute recently went down to 1.5 miles each way, each day. My average is now 21mpg.

My 996 was much better on short journeys.

Gunner Bill

90 posts

204 months

Saturday 20th March 2010
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I picked up a 55 plate A6 3.0 TDI Quattro w/ 95 kmiles a couple of weeks back and driving back from Leicester to Aberdeenshire recorded 37 mpg. Driving was a combo of 50 mph Average speed zones and 85 mph yomps in between.

I comfortably got from Leicester to my home in Aberdeenshire without stopping!

Consumption on the B roads where I've been enjoying the torquey engine is much less, around 25 mpg.

Edited by Gunner Bill on Saturday 20th March 22:06

Blown2CV

31,662 posts

234 months

Sunday 21st March 2010
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big diesels, esp highly tuned tend to afford quite a huge difference in economy between town and motorway driving. They can achieve pretty good figures on a run if the setup has a tall top gear. Not sure if the A5 3.0TDi has or not. My previous E280CDi used to return low 20s MPG normally but on the M-way sat in 7th gear the range would keep going up indefinitely. On a particularly long run I saw nearly 50MPG average, but this is not exactly easy to achieve. Probably a diesel that does 0-60 in under 6s doesn't really beg to be driven with an easy right foot.

KR

Original Poster:

183 posts

260 months

Sunday 21st March 2010
quotequote all
Car going into Audi tomorrow, think I've sussed it, the auto box is holding onto the revs for too long, if I drive it on the paddles the fuel econ goes up considerably. I know this is going to sound abit anal but in tiptronic mode it changes gear at 1,600 rpm, and in auto mode 1,900-2,000 which means the fuel difference is amazing. I'm been told it's a software upgrade, strange on a 10 reg car! Anyone want to do the same comparision, I'd be interested to see if its a one off or not.

Blown2CV

31,662 posts

234 months

Monday 22nd March 2010
quotequote all
KR said:
Car going into Audi tomorrow, think I've sussed it, the auto box is holding onto the revs for too long, if I drive it on the paddles the fuel econ goes up considerably. I know this is going to sound abit anal but in tiptronic mode it changes gear at 1,600 rpm, and in auto mode 1,900-2,000 which means the fuel difference is amazing. I'm been told it's a software upgrade, strange on a 10 reg car! Anyone want to do the same comparision, I'd be interested to see if its a one off or not.
Is the autobox not a relatively new addition to the A5 3.0TDi? Also, perhaps it learns your driving style which involves sufficient lead foot for it to expect you to drive like that all the time, even if you don't?

KR

Original Poster:

183 posts

260 months

Monday 22nd March 2010
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Car back, was told theres nothing wrong with it, all in my imagination!! Great, its me imagining 27mpg on the computer too.

gizlaroc

17,251 posts

255 months

Monday 22nd March 2010
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How many miles have you done in it, they are crap up to 10k miles, and then loosen up from there.


mikeh501

800 posts

212 months

Tuesday 23rd March 2010
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My 58 plate A6 3.0TDI Tiptronic returns 25mpg around town, 30-35mpg on combined town/a-roads and around 40-42 on the motorway. Its been like that since I bought it, no change in 16,000 miles.

I find my new commute which is far less a-roads and more city traffic really kills the MPG. Now does 25mpg on the way to work, and used to do about 30-35.

I'm assuming you haven't got it continually in S mode on the auto box biggrin

Edited by mikeh501 on Tuesday 23 March 09:21

Northern Munkee

5,354 posts

231 months

Tuesday 23rd March 2010
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Is it auto box and pulling around the quattro that gives the bad mpg, as unless my onboard trip is way off, it was pretty close on my golf, my a6 tdi sline manual fwd only just did a 530 mile round trip on 49mpg on cruise slightly north 0.7leptons over weekend.

UVB

557 posts

224 months

Tuesday 23rd March 2010
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The difference between a 2.7tdi fwd manual and the tiptronic quattro version is 6-7mpg on the combined cycle; would probably be the same on the 3.0tdi.

fatboy b

9,666 posts

247 months

Tuesday 23rd March 2010
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Burba said:
takes time to bed in?
What he said ^^^

My M3 a few years back had about 25K on the clock when it went for the crank-bearing recall. MPG dropped about 7 mpg for about 600 miles.

Deva Link

26,934 posts

276 months

Tuesday 23rd March 2010
quotequote all
KR said:
I'm driving it very sensibly.
Start stretching it a bit now (only once it's throughly warm, which takes about 20 miles).

KR

Original Poster:

183 posts

260 months

Tuesday 23rd March 2010
quotequote all
Thanks chaps, its definetely way better in paddleshift mode, and Audi figures are 40 mpg combined.