If you're talking about the manual transmission, I've used Prodrive transmission oil on my Mini Cooper S and loved it. However, it was quite costly so I switched to other brands like Torco and Liquid Moly just to try (cause if you don't try, you'd never know for yourself), but I still prefer Prodrive.
I'm not going to tell you how buttery smooth it was or yaddah yaddah. You'd just have to try it, to believe it! =)
Your mileage may vary.
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TEIN Monoflex with EDFC | H&R 20mm Spacer | SPC Rear Camber | HKS Hi-Power | Berks High Flow Cat | Stillen G3 | EVO R Rear Diffuser | Blacked out headlights | Z1 34Row Cooler | Z1 SS Brake lines
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