I currently own a BMW m3 csl and yes, i have used it on a few occasions at oulton park on a track day, it's magnificent!
I used to own a noble m12 gto3r and again used that at oulton and around rockingham and that was fabulous! i recomend you use your own car on a track day as you get a sense that you have extracted the best from the car you use everyday. Also it means you know its limits for when you drive it hard on the road!
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