Classic Mustangs are iconic vehicles, renowned for their style and performance. However, fuel economy isn’t typically the first thing that comes to mind when thinking about these vintage beauties. But can a classic Mustang actually achieve respectable MPG? Let’s delve into a real-world experience and explore the factors influencing Mustang Mpg.
The ’65 Mustang MPG Story: A Testament to Efficiency
One Mustang enthusiast, “Charlie Cheap said,” shared his experience with a modified 1965 Mustang, revealing surprising fuel efficiency. His ’65 Mustang, equipped with a Ford 200 cubic inch inline-six engine, underwent a .060″ overbore during a rebuild. Despite this modification, which can sometimes raise concerns about cylinder wall flex, the engine proved its mettle on a long road trip.
Driving to Tennessee and Mississippi, Charlie’s Mustang consistently ran at highway speeds, often exceeding 75 mph to keep pace with traffic. Even with the air conditioning running continuously, the car achieved an impressive 24.5 MPG. This real-world figure demonstrates that with careful engine building and tuning, a classic Mustang can indeed deliver commendable fuel economy, even while maintaining highway speeds and comfort features like AC.
Engine Tweaks for Optimal MPG
Charlie’s experience highlights several key modifications that contributed to his Mustang’s MPG. His engine build focused on highway performance rather than maximum power, a crucial factor in achieving better fuel efficiency. He utilized 8.8:1 compression pistons and optimized the static and dynamic compression ratios for road use, not racing.
Furthermore, Charlie implemented a meticulously tuned ignition system. This included a distributor built with BWD SELECT parts and a Pertronix conversion, featuring dual-advance mechanisms and modified springs. Ford 9mm wire wound plug wires, Autolite AP46 plugs gapped at .040″, and an MSD .8 ohm ignition resistor paired with an ACCEL 42,000 volt coil further enhanced ignition performance. These upgrades ensured efficient combustion, a cornerstone of good MPG.
Factors Influencing Your Mustang’s MPG
While Charlie’s modified engine achieved 24.5 MPG, several factors can influence a classic Mustang’s fuel economy. Engine condition, tuning, and driving habits play significant roles. Regular maintenance, including air filter replacement, spark plug upkeep, and proper carburetor or fuel injection tuning (if applicable), are essential.
Driving style also greatly impacts MPG. Aggressive acceleration and high speeds consume more fuel. Maintaining a steady pace, avoiding sudden braking, and anticipating traffic flow can significantly improve fuel economy. Tire pressure and vehicle weight are additional factors; ensuring proper tire inflation and minimizing unnecessary weight can contribute to better Mustang MPG.
Conclusion
The experience shared by “Charlie Cheap said” provides valuable insight into classic Mustang MPG. It demonstrates that with thoughtful engine modifications, meticulous tuning, and mindful driving, achieving mid-20s MPG in a vintage Mustang is not only possible but also a real-world outcome. For enthusiasts looking to enjoy their classic Mustangs on the open road without excessive fuel consumption, focusing on efficient engine building and optimization is key to unlocking surprising fuel economy.
