Fuel injection cleaner?

I have added it to a full tank before, just throw it from side to side after to give it a mix. Prolly be better to add it then fill it but i never remember to take it to the gas station with me.
 
I use SeaFoam or Berrymans. I would never use a STP product. SeaFoam can be used in diesel and gasoline engines and I have both, it works for me.
 
Seafoam here and never an issues on my cars. Haven't had to use it on motorcycle yet.
 
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