Fuel cleaner? Unless you have seen MPG drop drastically, rough running, poor idle, etc. don't rock the boat.
I don't even use fuel cleaner regularly on my carbureted Land Cruiser. I may have done a can of Seafoam like 10,000 miles ago but that's when I was running an aftermarket carb that seemed to like the stuff.
OH and if you're at one of those gas stations that sells the "Additech" stuff straight from the pump, don't ever buy that. I'd probably LOL if I saw someone do it.