Nope but I use Motul oils for all my bikes, and am more than happy with them. At the end of the day though, I think they aren't as necessary unless you're running a fairly aggressive setup. If you've got the $$$ to spare by all means, but there are cheaper alternatives that will do the job as well.
BTW: do they rate Motul car oil the same as motorbikes? I.e 510, 6100, etc, or is it just one generic range with different weights?
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