Hi all. I have an 09 Mazda 6 2l diesel. It's started to run rough and there's no power. Also today I got blue smoke. It's been to the garage a couple of times with these problems and it goes like new for a while and then back to this. There's no warning lights on. I hope someone here can help. Thanks

 

Didn't get the 2.0 diesel in the 2008/09 model in OZ, only the 2.2.

Take it to Mazda for a diagnostic scan.

How many kms? / miles?
Age of fuel filter?
Do you always use the same fuel station?