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Can you use unleaded fuel in a 1968 390 ci ford engine?

It is not recommended to use unleaded fuel in a 1968 390 ci Ford engine. Unleaded fuel is designed for use in modern vehicles with catalytic converters, which were not introduced until the 1970s. The 1968 Ford 390 ci engine is designed for use with leaded fuel, and unleaded fuel can cause damage to the engine's components.

Leaded fuel contains tetraethyl lead, which acts as a lubricant for the engine's valves and valve seats. Unleaded fuel does not contain tetraethyl lead, which can cause the valves and valve seats to wear prematurely. This can lead to a loss of power, engine knocking, and other problems.

In addition, unleaded fuel can damage the oxygen sensor in modern vehicles. The oxygen sensor is responsible for monitoring the amount of oxygen in the exhaust gas and adjusting the fuel mixture accordingly. Unleaded fuel can cause the oxygen sensor to fail, which can lead to poor fuel economy, engine stalling, and other problems.

If you have a 1968 Ford 390 ci engine, it is important to use leaded fuel. Leaded fuel is still available at some gas stations, and it is also possible to purchase lead additives that can be added to unleaded fuel.

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