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I had the Evo 3’s , as during Covid I couldn’t get the PS4s locally. but they started cracking on the shoulders and around the tread, almost like the heat cycles were killing the rubber.
I now run PS4s and have never had the issue again.

FYI: Seen this?
https://www.racinglines.com/fuchs-titan ... ve-1-litre

You then get to play with the Octane rating.

The advice to me from an independent Audi specialist with 40 years+ experience is: To use the best fuel available at the time... The odd tank of standard unleaded isn't going to damage anything, but in his experience, the sustained usage of 95 RON has proved to cause fuel system issues on these engi...

I see there hasn't been any response - But I do have the following to offer to each and every RS6 owner... Don't be trying to run these beasts on normal unleaded.... You will absolutely experience issues in the long term. To the OP - I guess I am quite lucky in that I can use the premium 99RON from ...

If it is persisting... I have an alternative solution. Buy a tin of Dettol "All in one" spray. Remove pollen filter. Run vehicle. Set fan to max fan & cool with air con on, but no re-circ. Spray Dettol in short bursts (3-4) into the gap that housed the pollen filter. Cycle through the air vent optio...

Ive just spent a good while researching the parts & procedures for changing the (3x) diff oils. At 35.000 I have just changed the front diff oil and it was like treacle, I expect the others to be in a similar way. I also have the Quattro growl on full lock at very low speeds... Replacing the centre ...

Jumped in and found what I hope will be my wagon of choice for a good while.
I am lucky to be mechanically minded and skilled and as such, I do like tweaking my vehicles.

Looking forward to the (rapid) journeys with the new RS6

Jim