I don't know if it's just me but i am hearing a ticking noise (probably metal noise) when cruising between 1500rpm to 2500rpm from my whisper diesel astra.
I know the diesel usually do more noise but, i am 99% sure this was not happening when the car was new with less miles.
The noise is not heard if you go more than 2500rpm or if you stop pressing the gas pedal.
Also the ticking does go faster when you accelerate until it's lost after 2500 , which could be due to engine background noise being bigger.
Also i am not experiencing any power loss, or something out of the ordinary.
You do have to lower the music/radio all the way down to actually hear it.
Also we are experiencing extra cold these days in Greece which is making the noise worse in cold startups.
I do have topped up the oil after 7000miles (12000km), with genuine gm dexos2 oil.
Also the startup noise definitely got worse from when it was new, don't know if it's related.
Any diesel owners want to comment on the above? (noise, oil consumption, etc)