My Valk is a little hesitant

when I first take off cold in the morning , after letting it run for about a minute,by then the choke is off, (I usually keep it on for about 30 seconds .)
It smooths out quick, 10-15 seconds so I figured a little Seafoam would be good for it.
The question is how much?

The can says 1 oz per gallon, but I've read posts where people dump in the whole can. I was figuring about 5-6 ozs, as I am on reserve now and will be filling it up soon adding about 31/2 gallons or four.
Thanks
Bill