I'm getting a bit of light grey smoke coming out under acceleration which can be a bit embarrassing at times, i've took the car to get a diag done and nothing came back injector wise. So i booked it in for a full check up and they have said they cant find anything wrong and that its normal for a car of this age, its a 55 plate.

Now im under the impression that the car didnt come out of the factory like this so its age shouldnt be an issue, it should still be fixable in one way or another. Apart from a new egr and de coke what else can i do? Turbo clean maybe? All hoses are ok and ive been putting in diesel additive for a good few weeks now and booting it down the motorway to clear her out, but it just reappears the next time im driving.

Scratching my head on this one....

Is the engine oil level ok? Is it using any oil? 

Oils fine, the garage say i have a nice little car and stuff but i wont be happy until i get this sorted.