0w20 or 5w20

whats the pros and cons of 0w what the the pros and cons of 5w

 

5w unless you are in extreme extreme cold, like -50 (without wind).

 

Red Line racing oils are categorized as “straight grades”, their low-temperature properties make them exceptional multigrades, allowing 2-4% more power than an oil of similar viscosity, while providing much more protection. Each reduction in viscosity grade allows 1-2% more power.

20 WT SAE (5W20)
For drag racing, circle track qualifying, and racing engines designed for low-viscosity oils. Many drag racers run this oil for 10 to 12 passes before changing, with no sign of shear or loss of viscosity. Popular with bracket racers looking for extra performance.

 

Yea , don't EVER use what the manufacturer suggests. They don't know what's best.

They just engineer , then build them.