Anybody DIY servicing their S8?

[Delboy]

Originally Posted by pwacka8

Just wondering a something like Terraclean could do a job decokeing , i think thats the main aim of Terraclean was to remove deposits from the engine.

It is, however on FSI engines where the fuel is injected straight into the combustion chamber, the only area it can clean are the combustion chamber, and maybe exhaust valves.

The biggest issue on FSI engines is a buildup of carbon deposits on the inlet valves due to the ingestion of crankcase vapours that carry oil into the inlet tract, that would be normally washed away in traditional fuel injection systems where the petrol was injected before the inlet valves.