Help Please 2.0 tdi mpg drop

[michael18mcc]

Hi folks anyone ever had a drop in mpg doing around 30 mile trip to work motor way miles and lucky you get 50 mpg seems to be using slot more fuel


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[Darren92]

Colder ambient temperature

 

[Garrett 69]

As above but it could also be due to dpf re-gen if you have a diesel.