[E86Z]

Hi all,

I've been getting much worse mpg than usual on my z, 2006 coupe with 60k miles. I'm going to go to an indy shop to get it diagnosed but I want to lead them in the right direction if possible. I've been getting roughly 17mpg versus 24 this time last year with the same winter tire set up.

So far I've cleaned my vanos solenoid with no change in mpg.
My k&n filter was cleaned a couple months ago.

From my research I've gathered that it could be a faulty vanos or solenoid or an o2 sensor.

Any other thoughts?

Thanks