CL9 Poor fuel economy

[chrome]

Thanks for all your replies.
I have changed the air filter but I am reasonably sure the fuel filter has only been done once in the 153,000k's. I looked in the book on how to change fuel filter but it doesn't even say where it is, so I gave up on that.
No misfiring or anything like that.
Also anybody know how much a new O2 sensor is ???

Silly question, but what fuel do you normally used? The Euro is specced for premium (95 octane and above). I know of people who put in the normal 91 octane and actually suffer from poor fuel economy, compounded with the fact that more and more stations now stock only the ethanol blended (E10) unleaded.

[Lochstar_69]

Silly question, but what fuel do you normally used? The Euro is specced for premium (95 octane and above). I know of people who put in the normal 91 octane and actually suffer from poor fuel economy, compounded with the fact that more and more stations now stock only the ethanol blended (E10) unleaded.

this is true, the E10 provides similar performance to the premium octane fuels but has the fuel economy of regular unleaded.