While the 12 Valve Cummins is known for its power and durability, it's not exactly a fuel economy champion. However, you can improve your fuel mileage with a few key adjustments:
Engine & Performance:
* Tune-Up: Ensure your engine is properly tuned. This includes checking and adjusting:
* Fuel Injectors: Worn injectors can lead to inefficient fuel delivery. Consider getting them tested or replaced.
* Fuel Filter: A clogged filter restricts fuel flow and reduces performance. Replace it regularly.
* Timing: Proper timing ensures optimal combustion. Consult a mechanic for accurate adjustment.
* Air Filter: Clean or replace a dirty air filter to maintain proper airflow.
* Exhaust: Consider:
* Exhaust Manifold: Cracks or leaks in the manifold can reduce efficiency. Have it inspected and repaired if necessary.
* Exhaust System: Ensure a free-flowing exhaust system without restrictions or leaks.
* Turbocharger: A healthy turbocharger is essential for optimal fuel efficiency. Get it inspected for leaks or damage.
* Fuel Economy Tune: This can involve re-flashing the engine's computer to adjust fuel delivery and timing for better mileage. However, it's important to find a reputable tuner to avoid damaging your engine.
* Fuel Economy Tires: Tires with lower rolling resistance can improve fuel mileage. Consider investing in fuel-efficient tires.
Driving Habits:
* Cruise Control: Utilize cruise control on highways to maintain a steady speed and reduce unnecessary acceleration.
* Anticipate Stopping: Brake gradually and avoid harsh braking, which wastes fuel.
* Smooth Acceleration: Avoid excessive acceleration. Accelerate smoothly and gradually for better fuel economy.
* Avoid Idling: Minimize idling time. Shut off the engine if you'll be stopped for more than a few minutes.
* Proper Gear Selection: Use the appropriate gear for the terrain and speed.
* Vehicle Load: Reduce unnecessary weight in the vehicle to improve fuel economy.
* Tire Pressure: Maintain proper tire pressure as recommended by the manufacturer. Underinflated tires can increase fuel consumption.
Other Considerations:
* Maintenance: Regular maintenance is key for optimal performance and fuel economy. Follow the manufacturer's recommended maintenance schedule.
* Aerodynamics: While not as crucial as other factors, minimizing aerodynamic drag can help slightly. This can include adding a low-profile cab cover or removing unnecessary accessories.
Important Note: Modifying your 12 Valve Cummins to improve fuel efficiency may require careful consideration and professional advice. Some modifications can affect engine performance, emissions, and warranty. Always research and consult with a qualified mechanic before making any significant changes.
