I usually take the D5 on long journey's as much as i can. Took it for a test drive today, 25 litres of Shell fuel, and millers additive. MPG went up by 22, that's still pretty bad, no success after all that driving on the motorway today.
I think the engine and turbo hasn't opened up yet, due to low miles. I will need to keep on driving till the turbo and engine open's up, only then the mpg will go up.
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