Stage 3 race ported Pineapple Racing 2 rotor. What oil should i use??? Type/Weight.

 

Some people say ALWAYS put non-synthetic in new engines untill it's broken in. Then afriend of mine told me to put synthetic in so later I don't have to put my engine through the trama of switching oil types. What would you do?

 

My engine builder recomended Valvoline Racing 20-50 Dyno oil, but since Rob built your engine, check with him.
-Jedon

 

Rob's website is down and I lost his number.