In general terms the TDI community considers additives such as Stanadyne, Power Service, Opti-Lube, Howe's, Liqui Moly, etc. as more beneficial than detrimental to the TDI engines (with or without DPF).
I would think that if you can bring your diesel fuel to the minimum quality standards that companies like Bosch require making your TDI engine run more efficiently then it will lessen the load on the DPF.
I can definitely agree with that. I always run a 4oz shot of Power Service Diesel Kleen whenever I fill up. [/quote]
You are talking about a car that requires an oil with an ash content that is insufferably low - 0.6 IIRC - to protect the DPF. You guys are putting stuff like this directly into the combustion chamber and therefore exhaust stream (as opposed to this strictly classified oil, which is only burned in minute qualities and then only as a residual of the lubrication process)? Do you have reliable information that would lead you to believe that this is OK for your DPF?
BTW, if you are concerned with lubricity and are confident that this stuff is DPF-safe, you'd be much better off with an additive that actually meaningfully enhances lubricity, like Opti-Lube. [/quote]