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Welcome to the Club, Richard. The fuel consumption you will get from a diesel depends very much on the length of the journeys that you do. As a comparison I have just checked the mpg on my s type which has the 2.7 diesel V6 engine, and it is 20.4 mpg. In the past three weeks I have only done short runs and that high mpg doesn't surprise me. I will probably do a longer run this afternoon or tomorrow and I expect to get about 40 mpg. The best mpg I have had is 50.2 which was driving to Sheffield on the A38 and M1, with a 50mph limit on the M1 due to road works. Driving down to Devon last year for a holiday, I got 46 mpg, which is normal on a long run using Cruise Control. I also use premium fuel which I find gives me a better mpg. Regards, Peter.