1. Carrying Excess Weight.

2. Bad Spark Plugs.

3. Dirty Air Filter.

4. Low Tire Pressure.(Standard 34 psi-37 psi)

5. Bad Oxygen Sensor. 

6. Bad Engine Oil.

7. Improper Gear Changes.

8. Driving Too Fast. (Above 95 Km/hour)

9. Using Air Conditioning.

---