hi guys
i have honda accord 2.0 2005 k20 engine
manual suggest api sj or sl oil which is a1b1 spec 5w30 for best fuel economy
but also allows others viscosity from chart 0w30. 0w40 5w30 5w40 10w40
i can see diesel is 0w30 only in a5b5 full saps
previous owner serviced with Honda dealer on...