for a 2jzgte on stock twins what engine oil are you running (type and brand)

my car is fully stock not even an exhaust but I put in royal purple 10w40 (w40 because I read somewhere that it helps with a turboed motor that gets fairly hot , true)

well anyways I put the royal purple 10w40 and maybe I am crazy but I think my aristo did not pick up as fast as it did before is it possible to lose power with 10w40 over lets say 10w30 ?

I dont think I will be using royal purple again regardless so looking for ideas for new oil to get for summer use only on a Aristo

 

i use motul 5w40 with my single turbo
setup

 

Personally i just use good 10w40 but i change my oil regularly more often than every 3000 miles no problems @ all. i have a friend that uses royal purple and he says he does not see much difference just expensive

 

castrol 10w40 semi synthetic here

 

I use what toyota uses valvoline 5w30

 

5W30 synthetic Either Mobil 1 or Castrol Syntec.