After driving a 520 for a couple of years I eventually upgraded to a 91 525 last autumn. Its a huge improvement but i'm considering getting a 535 as I still want to be faster! My only concern is the increase in running costs particularly as here in the uk we're paying nearly £1 per litre!!! I've seen sellers saying they get about 24mpg, thats the same as I'm getting now!

Any advice?