thanks for the link.... looks like that is the blend, not full synthetic, buti imagine the 5/20 is close enough to the 5/30 for the additive info. looks pretty good on the zinc/phos for a sn+ oil.
i'm in northeast iowa & we have a couple citgo gas stations but ive never really seen the oil in auto stores or walmart. but it is carried at some farm fleet stores, & there was a black friday sale at the fleet farm store, full synthetic 5qt jugs for for $6 after rebate so i gave it a try. got a great deal on valvoline full synthetic too, $8 for 5qt jug after rebate.