Yes? What about it? It is an industrial/marine engine. Never used for automotive purposes.
Use exactly what Toyota recommends which is more than likely 5w20 and not 5w30.
23-25 mpg city 30-32 mpg highway
Possible
Late 30's
355
30 degrees
30 degreees
5w-30
5w-30
5w 30
5w-30.
a 406 is a 400 bored .30 over