I can't vouch for what it's like on an Audi but I had it done on my 1994 Cavalier Turbo and the results were really impressive.
I was sceptical going in, so we arranged an emissions test before and after at a local garage. The before test was embarrassing - the car smoked out the garage and would have failed an MOT miserably. 20-ish minutes later and we went back to the garage and the MOT tester couldn't believe his eyes! He emerged from the car holding the two results sheets beside each other saying "what the *&%$ did you do to it?!?!".
The drive before and after was night and day.
I can't recommend it enough and it'll probably be one of the first trips I make once I buy my Audi. I also had it done on my 3.0 petrol Volvo and although the difference was noticeable, it wasn't as shocking as the Cavalier.
In case anyone's interested, the company I used in Milton Keynes has an offer on right now of £10 off per car. I want to stress that I'm not affiliated with either the company or Terraclean - just a happy customer.
|