Plastic and metal fuel storage tanks each have their own advantages and disadvantages. Plastic tanks are lighter, corrosion-resistant and flexible, but less resistant to high temperatures and more susceptible to physical damage. They are ideal for lightweight applications, such as residential storage. Metal tanks, on the other hand, are very strong, resistant to high temperatures and suitable for a variety of fuels. They have a long service life, but are heavier, more expensive and can corrode without proper treatment. These tanks are often used in heavy industrial environments. The choice depends on the specific requirements of the project.