Maintenance is Key:
* Tune-up: This is the most crucial step. Ensure your ignition system (plugs, wires, distributor cap, rotor) is in top condition. A worn distributor cap and rotor can cause misfires, leading to significantly reduced fuel economy. New spark plugs are crucial. Consider a professional tune-up.
* Air Filter: A clean air filter is essential. A clogged filter restricts airflow, causing the engine to work harder. Replace it regularly, according to the manufacturer's recommendation.
* Fuel Filter: A clogged fuel filter restricts fuel flow, impacting performance and economy. Replace it regularly, as recommended.
* Oxygen Sensor: A faulty oxygen sensor prevents the engine from accurately mixing air and fuel, leading to poor combustion and reduced MPG. If your truck's check engine light is on, this is a likely culprit.
* PCV Valve: A faulty PCV (Positive Crankcase Ventilation) valve can cause excessive crankcase pressure, leading to oil leaks and reduced fuel efficiency.
* Throttle Body Cleaning: A clean throttle body ensures smooth airflow. Cleaning it can improve throttle response and fuel economy.
* Tire Pressure: Maintaining the correct tire pressure (as indicated on the sticker inside the driver's side doorjamb) is crucial. Under-inflated tires increase rolling resistance, lowering fuel economy.
* Wheel Alignment: Proper wheel alignment reduces tire wear and improves fuel economy.
* Transmission Service: For automatic transmissions, a fluid and filter change can help the transmission operate more efficiently.
Driving Habits:
* Smooth Acceleration: Avoid jackrabbit starts and aggressive acceleration. Accelerate smoothly and gradually.
* Maintain Speed: Cruise control on level roads can help maintain a consistent speed, improving fuel economy.
* Avoid Idling: Excessive idling wastes fuel. Turn off the engine if you'll be stopped for more than a minute.
* Plan Your Route: Avoid unnecessary stops and traffic congestion.
* Reduce Weight: The heavier your truck is, the more fuel it consumes. Remove any unnecessary weight.
Minor Modifications (Proceed with Caution):
* Overdrive Gear (if applicable): If your transmission has an overdrive gear, make sure it's engaged when appropriate.
* Aerodynamic Improvements: While significant improvements are unlikely, adding a low-profile tonneau cover (if you have a truck bed) can slightly reduce drag.
* Fuel Additives: Fuel injector cleaners can help clean deposits, potentially improving fuel economy, but use sparingly and as directed.
Things to Consider:
* Engine Condition: A worn-out engine will inherently have lower fuel economy than a well-maintained one. Major repairs might not be cost-effective.
* Driving Style: Aggressive driving negates the benefits of any improvements.
* Truck Use: If you regularly haul heavy loads or tow trailers, your fuel economy will always be lower than what's achievable with a lightly-loaded truck.
Important Note: Before making any significant modifications, consult a mechanic. Improper modifications can damage your engine or void your warranty (if applicable). Focus on proper maintenance first; it's the most cost-effective and reliable way to improve fuel economy.
