Was the oil spec in 2006 SL or SM Ratings
It doesn’t matter.
SM is the latest spec for all vehicles.
So if your vehicle has the SL spec, SM is the next best thing.
Probably says what oil you need on the oil filler cap
I’m seeing SJ (or above) spec’d for the 06 Sonota w/the 4 banger 2.4 L engine.