Thanks for your comments.
I have not upgraded the car so it is as per the factory, altough is a
1994 model. When I first got the car I tried not to use the turbo too much
and was getting about 30mpg, however even driving it sensibly now I am
getting about 20-25mpg. The car is losing water from somewhere so i don't
know if this is making the difference but I can't see where it would be
leaking from. It loses about 1 litre a week. There are no signs of a leak
under the car and the engine is very smooth and the oil is clean so I
don't think its a gasket. I will check the water pump for leaks as soon as
I get the chance as one of the other members suggested.
ALso there is a fluid leaking from the carbon cannister which I need to
asses to see if fuel is somehow feeding up to this.
