I've often wondered about this and read many mixed reviews.
On the one hand, it sounds great and, particularly on the 'swirl flaps' it might be a good treatment.
But, on an older, higher mileage engine, I wonder if some of the carbon is compensating for wear and tear.
I might have imagined it, but when I had an oil flush done before the oil change on a recent service, the start-up 'death rattle' seemed a bit worse than before.
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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