The Buick Skylark Fuel Tank is one of the vital auxiliary units that hold fuel for the engines of a particular car. It not only store fuel but also has electric fuel pump and sender unit for fuel gauge located in it. Additional, the tank also has baffles that help eliminate fuel sloshing and reduce noise; it is also part of the Evaporative Emission Control System or EVAP, that keep fuel vapors from escaping. Its type may either be metal or plastic, yet, metal fuel tanks tend to rust while plastic fuel tanks on the other hand are likely to crack. Fuel cells used in the racing cars are engineered in such a way that in case of an impact, they do not puncture or spill fuel, creating a safety measure in the high-speed collisions. Further, Integrated high capacity fuel tanks using military grade polymer can be opted to enhance the driving reach enormously. It is possible to make the following recommendations for the Skylark Fuel Tank proper functioning and long life: cleaning, checking the state of seals, and avoiding corrosion.