Audi A4 3.0 Quattro - Few buying & LPG questions

[m4tt]

Considering these as a next car. Couple of questions:

Any common problems to watch out for?
What would average MPG be?
Is it suitable for LPG conversion?

Thanks in advance

Matt

[Cupramax]

Pretty solid motors, I ran a 3.2 quattro for 4 years which was a development of the 3.0 and found economy to settle around 23mpg but that was mostly town driving for me. It would rise to around 28/9mpg on long runs which is pretty good for a big heavy 4wd car + v6 lump. With no turbo's to worry about its really down to condition and service history.

[Atlas 12v]

I currently have a 3.0Q Sport ( http://www.pistonheads.com/sales/1780901.htm ) I find 24 mpg in general driving and see approx 28-30 on motorways.

[hman]

I have a 3.0Q A6 ( slightly bigger I know but not much) I get average 24mpg on a commute and 31 on a 70mph motorway journey.

Start booting it down the lanes and it soon becomes 23mpg.


Things to look out for :-

Cambelt change (and waterpump) as these are fairly expensive

Blowing from the flexible sections on each down pipe

Suspension bushes becoming tired

Check all the electrics work as there have been problems with some A6's ( maybe a4's too?) of water getting in and wrecking the ecu's

Coil packs can go faulty ( well there is 6 of them!) , I keep one in the boot just in case.

Other than that enjoy the very smooth torquey quiet ride!

[UVB]

We used to get 26-27mpg from ours (sold it just over a year ago - 2004 Avant manual) but managed to get 32mpg once by driving like a grandad. Biggest problem I had with it was the front brakes - I found the standard discs are liable to warp. Tried EBC replacements but they warped in no time at all (a very expensive mistake). Ended up putting some Nitrac ones on it and they were much, much better.

I think I did look into LPG and there seemed to be a few options but we needed a bigger car anyway hence we now have an A6.