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Old February 7th, 2018, 18:58   #3
tikal
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Join Date: Apr 2001
Location: Southeast Texas
Fuel Economy: 37 MPG (~ 45% city)
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These cars need to be 'exercised' from time to time as stated above. If you have a manual look up how to do the "Italian tune-up" (once the engine is properly warmed up). I presume with an automatic it can be done also.

Then there is this product from LiquiMoly:

https://products.liqui-moly.com/pro-...cleaner-4.html

I do not have any experience with it as my TDI does not have a DPF but it is something you might want to research. It does not go into the tank but rather you have to apply it somehow on the DPF itself. YMMV.
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