cobra jet

Up for sale is my 2012 Ford Mustang Boss 302 with only 17K miles and over $20,000 in upgrades. Boss 302’s are outstanding cars but like all cars they have their weaknesses. The weak MT-82 transmission was replaced with a Tremec Magnum XL with a McLeod RXT twin disk clutch, lightweight flywheel...

For those with the Boss, Cobra Jet and GT350 intake manifold, are you running something other than 5W20? Wondering how it will hold up to the more extreme conditions. I know oil threads can be a giant can of worms so I'm only looking for answers from those who actually have an aftermarket intake...