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Are old Ford Broncos good on gas?

Old Ford Broncos, particularly those from the 1960s and 1970s, are not known for their fuel efficiency. These classic SUVs were designed with a focus on off-road capability and rugged performance, rather than optimizing for gas mileage.


Factors Affecting Fuel Economy of Old Ford Broncos


Several factors contribute to the relatively poor gas mileage of older Ford Broncos:



  • Engine Design: Early Bronco models were equipped with large, powerful V8 engines that prioritized torque and horsepower over fuel efficiency. These engines were not designed with modern fuel-saving technologies.

  • Aerodynamics: The boxy, upright design of the classic Bronco bodies creates significant wind resistance, which reduces fuel efficiency at higher speeds.

  • Weight: Older Broncos were built with heavy, solid construction, making them significantly heavier than modern SUVs. The additional weight requires more fuel to move the vehicle.

  • Transmission: Many early Broncos were equipped with manual transmissions or older automatic transmissions that were less efficient than modern gearboxes.


As a result, most vintage Ford Broncos from the 1960s and 1970s can be expected to achieve fuel economy in the range of 12-18 miles per gallon, depending on driving conditions and individual vehicle specifications.


Improving Fuel Efficiency of Old Ford Broncos


While the inherent design of classic Broncos makes it challenging to significantly improve their fuel economy, there are some modifications that can help:



  • Engine Upgrades: Swapping the original engine for a more modern, fuel-efficient V8 or even a V6 engine can provide a noticeable boost in gas mileage.

  • Transmission Upgrades: Replacing the transmission with a modern, overdrive-equipped automatic or manual gearbox can also improve fuel efficiency.

  • Aerodynamic Modifications: Adding features like a front air dam or streamlined bumpers can help reduce wind resistance and improve highway fuel economy.

  • Tire and Wheel Upgrades: Switching to lighter wheels and tires can reduce the overall weight of the vehicle, contributing to better gas mileage.


However, it's important to note that these modifications can be costly and may not always be practical or desirable for owners who prioritize the authentic, vintage character of their classic Ford Bronco.

Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.