Materials Added To Fuel
All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or other additives are not needed under normal conditions and would result in additional cost.
Therefore you should not have to add anything to the fuel.
See also:
IT'S THE LITTLE THINGS THAT COUNT
Storage Compartments (Puny, Fair, Ample, Galore): Ample
Cargo/Trunk Space (Puny, Fair, Ample, Galore): Ample ...
Seat Belts
Inspect the belt system periodically, checking for cuts, frays, and loose parts.
Damaged parts must be replaced immediately. Do not disassemble or modify the system.
Front seat belt assemblies must ...
Cooling System – Drain, Flush, And Refill
If the engine coolant (antifreeze) is dirty and contains a considerable amount
of sediment, clean and flush with reliable cooling system cleaner. Follow with a
thorough rinsing to remove all depos ...