Fuck me there is some shit in the Ferrari chat thread!
Just goes to show a Medical Doctor knows FUCK ALL about engineering, no matter how much ca$h he makes or typing speed he has or cars he own's
You dont need a degree is arse sex to know that the physically thinner an oil, the more metal to metal contact there is!
Mobil 1 5W-50 is a great oil to use in a Rotary, stay away from the "thinner grades" as promoted by our Ferrari Chat Dr cock wash BDC & HC styled posting rant.