Pictures says API SF, which is good.
I've heard/read no newer than API SL or CI for our F/2F engines.
SF is min. 1500 ppm ZDDP
SG is min. 1200 ppm ZDDP
SL is min. 1000 ppm ZDDP
My FJ40 is due for an oil change soon...
EDIT: I have the same concerns as Dave...would it better to stick with a "known" (assuming "better") brand oil and just add zinc additive?