Anyone recommend the royal purple that works best with a turbo car? They have the racing oil, standard, heavy duty and light royal purple oils. What weight you guys run?

Anyone have an inside scoop on the cheapest place to buy it by the case?

 

Tranny, engine, differential...Which for?

 

Just oredered a case from RB. No discount for qty purchase.

Their techs recommended 10w30 for my stock port NA with intake & exhaust.

 

engine, large street port running 16 psi with a T04S

 

isnt royal purple a synthetic oil? youre not supposed to put synthetic in a rotary right?

 

Mazda said it is alright to run synthetics in the rotary engines, as long as they don't resist burning to the point that they don't ignite like a standard oil does inside the combustion chamber.