I say nuts to all this
How come we don't just get a walnut shell blasting every 40k or so, even if out of our pocket? The service is available. We seem to have enough anecdotal evidence now don't we? A speed shop guy cautioned me in June last year to be on the lookout for this. This was when I had the car for only one month so it kinda went in one ear and out the other. And run a good fuel additive and drive it hard. We bought the car to drive it hard anyway, did we not? And get good mileage to partially soothe our conscience.
Quaife LSD, M3 Rear Subframe Bushings, M3 sways, M3 OEM Suspension Front and Rear Component Kits (except strut brace), Ground Control Caster/Camber Plates, AC Schnitzer M3 Sport Springs, JRZ RS1 dampers, JBD 100%, Goodrich SS brake lines, APEX ARC-8 wheels with Michelin PSS tires.