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Hi there, first post. I have 530d sport touring G31 on 20s just over 3 years old and I have done 33k miles in it last 2.5 years with average of 42.3mpg over that time. It does mainly short trips so happy with that, considering I don't tend to hold off the gas. On regular cross country school run I could get 50 mpg if drive carefully, but not any more. It has just had main dealer oil etc service at £500 and I would say mpg has dropped by 15percent. On same run the max I can get is 43mpg. Anyone had similar? I did notice that that they did an update to the idrive as the Weather App vanished so wonder if an engine mgmt software update was done. Or they overfilled it with oil? The car drives as before if anything feels smoother but it bugs me that expensive service seems to have spoilt a car that is super quick and super economical at same time. Would be interested to see if others have had same experience, thanks