Also, if you don't know the MX-5 cup answers, we've all agreed to accept "spec miata" answers as "good enough".

Thanks!
-john

I run Valvoline racing 10w-30 in my spec miata. I know other guys who run 10w-50

Help settle an argument here at work.

I'll leave out the various suggestions, and just ask the basic question to reduce the heat of the topic...

What viscosity motor oil do the MX-5 Cup cars run in their motors for cup events?

Thanks in advance if anyone knows the answer.

-john

MX-5 cup cars... what viscosity motor oil do they run?