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What is an 18 wheelers fuel tank made of?

18-wheeler fuel tanks are typically made of aluminum or steel.

Here's a breakdown of each material:

* Aluminum:

* Pros: Lighter weight, corrosion-resistant, more fuel-efficient due to lower weight.

* Cons: More expensive than steel, can be more prone to dents and damage.

* Steel:

* Pros: More durable, less expensive than aluminum.

* Cons: Heavier than aluminum, more susceptible to rust and corrosion.

In addition to the main material, fuel tanks may also have:

* Inner lining: To prevent rust and corrosion, some tanks have a lining of epoxy or other protective coatings.

* Protective coating: An external coating of paint or other material can help resist scratches and damage.

The specific material choice often depends on the intended use of the truck, budget, and the manufacturer's preference.