Hi have you now realised that is all Audi want to do is sell you a new DPF, good skills with the additive it definitely keeps it at bay, considering that nearly all branded DPFs have Silicon Carbide cores they should outlast the car thats why any DPFs they remove are sold via a third party, sonically cleaned and sold as refurbished, makes you smile when you think £220 versus £10,000 for IDOS managed to do the job don't you detect the faint odour of lying Bar steward.
Steve.