1. Reduce Weight:
* Remove unnecessary items: Conversion vans often carry a lot of extra weight. Take out anything you don't need regularly. This includes extra furniture, unnecessary storage items, and heavy accessories.
* Replace heavy items with lighter alternatives: Consider lighter materials for seating, shelving, and other interior components if feasible. This is often a major undertaking and might not be practical.
* Empty the fuel tank when not in use: Carrying extra fuel adds unnecessary weight.
2. Improve Aerodynamics (Limited Effectiveness):
* Reduce drag: While not drastically impactful, minimizing exterior additions like roof racks (unless absolutely necessary) can slightly improve aerodynamics. Consider a lower profile roof rack if you must have one.
* Maintain tire pressure: Properly inflated tires reduce rolling resistance, although the impact on a large van is relatively small.
3. Optimize Engine Performance:
* Regular maintenance: This is crucial. Ensure your engine is properly tuned, the air filter is clean, and spark plugs are functioning optimally. Regular oil changes are essential. A dirty air filter dramatically impacts gas mileage.
* Fuel system cleaning: A fuel system cleaner can help clear out deposits and improve fuel efficiency.
* Consider fuel additives (use cautiously): Some fuel additives claim to improve mileage, but their effectiveness varies, and some can even harm your engine. Research carefully and read reviews before using them. Don't rely on these as a primary solution.
* Driving style: Gentle acceleration and consistent speeds significantly impact fuel economy. Avoid aggressive braking and rapid acceleration. Highway driving at a steady pace is much more efficient than stop-and-go city driving.
4. Modifications (Potentially Costly and Complex):
* Overdrive transmission (if not already equipped): An overdrive transmission can significantly improve highway mileage, but this is a major mechanical modification.
* Engine modifications (not recommended for novices): Modifications like performance chips or engine tuning can potentially improve mileage, but require expertise and careful consideration. Incorrect tuning can damage your engine. This is generally not recommended for a vehicle as old as a G20.
5. Realistic Expectations:
It's important to remember that you won't achieve dramatic improvements in gas mileage on a Chevy G20 conversion van. These vehicles are not designed for fuel efficiency. The improvements you can make will be incremental rather than transformative. Focus on consistent maintenance and mindful driving habits for the best results.
