How short?
If it's less than 5 miles, then you might as well stick with petrol, as such a short journey will foul up the DPFs in no time.
And if it's such a short journey, why is consumption that important?
Assuming a 10 mile return journey, 5 days a week, that's only 52 miles, so getting 30mpg instead of 20mpg will only save you about 4 litres of fuel a week - factor in the extra cost of the diesel itself, and the extra cost to buy a diesel, and the extra maintenance cost of a diesel (think injectors for example), then there is no point getting a diesel for a short commute.
Have you considered two cars? Or a V8 and a moped for the commute?
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2019 BMW M5 (my daily driver)
2002 Mark's D2 S8 FE
2020 BMW M340d xDrive (Anely's daily driver)
2000 FL D2 4.2 QS - SOLD 2011
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