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Why do you only get 190 miles to a tank of gas in 96 Chevy blazer?

There may be several factors that could contribute to the reduced gas mileage you're experiencing in your 1996 Chevy Blazer.

1. Engine Issues:

- Check the engine for any potential problems that could affect fuel efficiency. This includes issues such as a faulty oxygen sensor, clogged fuel injectors, or a worn-out spark plug.

2. Transmission Problems:

- Ensure that your transmission is functioning properly. A slipping transmission or worn-out transmission components can reduce fuel efficiency.

3. Tire Pressure:

- Make sure your tires are properly inflated according to the recommended tire pressure. Underinflated tires can increase rolling resistance and reduce gas mileage.

4. Driving Habits:

- Aggressive driving, such as rapid acceleration and hard braking, can reduce fuel efficiency. Try to drive smoothly and maintain a steady speed whenever possible.

5. Aerodynamic Drag:

- Additional accessories or modifications on your vehicle that increase aerodynamic drag can impact fuel economy. Consider removing any unnecessary items that might be causing resistance.

6. Fuel Quality:

- Use high-quality fuel with the recommended octane rating for your vehicle. Lower-quality fuel can result in reduced fuel efficiency.

7. Maintenance Schedule:

- Follow the recommended maintenance schedule provided by the vehicle manufacturer. Regular oil changes, filter replacements, and other maintenance tasks can help ensure optimal fuel efficiency.

If you're still experiencing low gas mileage despite checking these factors, it's recommended to consult with a qualified mechanic or take your vehicle to a reputable automotive repair shop for further diagnosis and repair.