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Ford Mustang Fuel Tanks

Ford Motor Company first offered the racy Mustang as its sports model vehicle in 1964 and has continued to sell Mustangs ever since. Originally, the Mustang came equipped with a 16-gallon gasoline storage container. Through the years of its service, the Mustang has seen upgrades of fuel tanks to 18 and 22-gallon capacities and then back down to 16-gallons again.

Is the Ford Mustang an economical car?

The first models of Mustang produced were considered particularly economical on gas. Some sub-models have maintained that reputation in the years since. For instance, in 1969, Ford produced the first fastback models of Mustang. Some were equipped with the gas guzzling V-8 engine with tremendous power, and others came equipped with the smaller V-6 motor that proved to be a gas sipper. Every year, it seems, the customer is offered the choice of power or economy in Mustang models.

Are there any differences in the fuel tanks?

Yes, there are several differences between fuel tank designs in Ford Mustangs.

  • Gasoline capacity: One of the most significant differences is gasoline capacity. The more powerful machines use more gasoline and thus carry larger gasoline storage containers to make a minimum 300-mile consumer expectation.
  • Fuel pump position: Another difference comes in fuel pump position. Over the years, fuel pump designs have changed, and fuel tank designs changed to accommodate those pump design updates.
  • Neck sizes: Gasoline neck sizes and configurations change with each new model of Mustang.
  • Pocket parts: Protective pocket parts changed as new materials became available. Plastic has taken over this protective piece from the steel pockets found in early Mustang models.
Will a smaller fuel tank fit into any Mustang?

No. When body configurations change, then fuel storage tank designs change with them. Though all Mustang fuel storage tanks fit under the carriage behind the rear wheels and out of view, you cannot assume that the area in which the tank sits is of a consistent design. Some Mustangs are designed for a lower silhouette. These muscle cars sit low to handle dangerous curves at a higher velocity. Other Mustang designs are elevated, allowing more room for a storage tank. The inconsistency of body type means a lack of consistency in fuel tank size.

When should fuel storage tanks be replaced?

Everything deteriorates over time when exposed to a corrosive material like gasoline. Your gasoline storage container will develop leaks after many years. With the older Mustangs considered a classic car, it is important to change the gasoline tank at least every 20 years, if not sooner. If you are rebuilding an older model, it is a good idea to begin that rebuild with a new fuel storage tank. Tanks with accident damage need an immediate change out. The impact forces in an accident affect seals and welds that maintain fuel storage tank integrity, reducing the lifespan of this super duty container.