opinions on how to flush the 4jb1t out.
additive added to old oil then drain?
additive added to new cheap oil then drain?
degreaser/kero added to old oil? probably won't do this as i don't want a crankcase explosion but believe it or not it was suggested to me
any other suggestions welcome.
i just wanna clean out this engine as it's really an unknown and my oil which is less than 3000km old has started going sludgey and has high oil pressure longer from a cold start than it did when i changed it. so for now i'm being extra gentle when it's cold.