Peugeot 607 fuel economy drop

I drive a Peugeot 607 2.2HDI auto (this is my second one in a row). I was averaging 38 - 40 mpg but I notice in the last couple of months this has dropped to 30 -32 mpg. My driving style has not changed, the car is regularly serviced - there is no apparent leak - do you have any suggestions?

Asked on 23 February 2012 by GDL

Answered by Honest John

Possibly a clogged air filter.

Tags: fuel economy owning

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