I don’t know that you would NEVER need a clean. As there is going to be build up there isn’t anything that I can think of that they would do to prevent that. BUT when a supercharger your going too see less build up than a NA car and even tho APE had a good amount of build up it wasn’t quite RS4 levels of build up. Its almost like Audi got a little better with the PCV and oil separator systems.
I keep hearing mixed results on costco gas. Its very affordable… now afordable is important safe is higher on the list for me.
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With the RS5, they did change the PCV and air oil separator system. They also apparently run the car a bit hotter which lessens the volatiles buildup in the oil. I’m sure they changed the valve overlap a bit too and oils have gotten better too (like Motul Specific).
My father worked in the petrol (gas) industry as an engineer as well as sales. All the big guys basically “order” their gas with their specified packages (detergents, performance additives, lubes, etc…) but they’re all basically refined in the same places. I think we’re down to six refineries with one more scheduled to come online. I don’t keep track much these days. Anyway as long as it’s labeled top tier, you’re getting the best stuff. It’s actually better to purchase from a really busy gas station like Costco as the gas is fresh as they say. But it meets the minimum octane rating and qualifies as top tier due to the additives package.
Speaking of which, I really need to experiment with some toluene or xylene. That stuff’s around 117 octane and makes a nice octane booster. I used it in my tuned to the edge of death big turbo rotary. The tune is “adaptive” so I should see some benefit or at least it running at optimal consistently. Toxic as shit though.