CNG (Compressed Natural Gas) is generally cheaper than petrol, both in terms of per-unit cost and overall running expenses. Here’s a detailed comparison:
Cost Per Unit in Nigeria
- CNG: Approximately ₦230 per kilogram.
- Petrol: Prices vary, but petrol often costs significantly more per liter (around ₦1040–₦1200 per liter, depending on location).
Fuel Efficiency Comparison
- Energy Content:
- 1 kg of CNG is roughly equivalent to 1.5 liters of petrol in terms of energy output.
- This means CNG offers better mileage per kilogram than petrol per liter.
- Running Costs:
- A vehicle running on CNG can reduce fuel expenses by 40–60% compared to petrol.
Upfront Costs
- CNG Conversion:
- The conversion cost for a petrol car ranges from ₦1.2 million to ₦1.5 million.
- While this is a significant investment, it can be recovered over time through fuel savings.
Maintenance Costs
- CNG Systems require regular servicing, but overall maintenance costs are often lower because CNG burns cleaner, causing less wear and tear on the engine.
- Petrol engines may have higher long-term maintenance costs due to carbon deposits and fuel impurities.
Example Scenario
If you drive 1,000 km per month:
- Petrol cost: 10 km/l average = 100 liters × ₦1040 = ₦104,000
- CNG cost: 15 km/kg average = 66.7 kg × ₦230 = ₦15,341
Savings: Approximately ₦88,659 per month!
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