My Passat sport 2001 used to achieve 650 miles per tank. I'm now getting only 500 miles per tank. Any ideas on the problem and how can I improve the fuel efficiency ??

Your help is very much appreciated.

John Mac, February 2011

Might find some help here

http://www.honestjohn.co.uk/forum/post/index.htm?t=63685

Maurice, February 2011

Have the vehicle serviced regularly and drive with less gusto. Check that you do not have a fuel leak. Check for a worn clutch and or binding brakes.

The fuel metering (rate of flow) in modern cars is very precisely controlled by the engine management system.

I am not qualified to give you this answer - I know nothing of cars.

Peccavi, February 2011

so it has

peccavi, February 2011

the price of fuel has went up.

belfast4, February 2011