Originally Posted By: Justin251
I think op isnt wanting an oil that can also be found in regular cars because he thinks his flat 4 is specifical.
I highly doubt m1 0w40, castrol edge 0w40, or penzoil ultra 5w40 wouldn't do a fantastic job and for less than $150 every oil change.
Which is ridiculous anyway.
I also second the oil cooler recommendation. That would probably make more of a difference than brand.
OP does think that his flat-4 200 HP from a 2L engine is special, but he also said "I'm learning".
If Mercedes, BMW, Porsche ... use M1, Castrol 0W40 in their engines, including MB AMG, BMW M-sport it is evidence that these oils are very stout for high-performance engines. Use it in your FRS/BRZ engine with confidence.