Fuel Cost Comparison Tool: 5 vs 6 vs 7 L/100km with Custom Fuel Price
Disclaimer:
This post is based on my personal experience and intended for informational and educational purposes only. Procedures, tools, and parts may vary depending on the vehicle and situation. Always consult your service manual or a professional before performing any maintenance.For more information, please read the full disclaimer here.
🚗 Fuel Cost Compare
Compare how fuel consumption and fuel price affect your total trip cost.
Scenarios
Scenario A
Scenario B
Scenario C
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Fuel Cost Comparison Tool (5 vs 6 vs 7 L/100km)
This calculator is designed to show the real-world cost difference between vehicles that consume 5, 6, or 7 liters per 100 km. While these numbers may look close on paper, the financial impact becomes clear once you apply real distance and fuel prices.
Instead of relying on theoretical fuel economy figures, this tool converts consumption into actual trip cost. It helps you understand how much you really spend every time you drive, whether it’s a short commute or a long road trip.
The goal is simple: turn fuel consumption data into real money values that are easy to compare and understand.
How to Use the Fuel Cost Comparison Calculator
Using the calculator is straightforward. First, enter your total trip distance in kilometers. Then define the fuel price per liter based on your local station or current market price.
After that, set up three different consumption scenarios (A, B, and C). These can represent different cars, driving styles, or engine types.
You can also override fuel price per scenario if you want to simulate different countries or refueling conditions. Once you click “Compare”, the tool instantly calculates total trip cost for each scenario.
Why Fuel Consumption Differences Matter
Even a small difference in fuel consumption has a long-term financial impact. A car consuming 5 L/100km will always cost significantly less than one consuming 7 L/100km over the same distance.
The difference becomes more noticeable when fuel prices are high or when you drive frequently. Over months or years, this gap can translate into hundreds or even thousands of euros.
Custom Fuel Price Input Explained
Unlike basic fuel calculators, this tool allows you to define a custom fuel price for each scenario. This is important because fuel prices vary significantly between countries, regions, and even time periods.
For example, you might compare a scenario with €1.50/L against another with €1.85/L. This gives a much more realistic picture of actual driving costs instead of using a fixed global value.
Basic Calculation
The calculator uses a simple formula:
Fuel used = (Distance ÷ 100) × Consumption
Total cost = Fuel used × Fuel price
This makes it easy to understand how both consumption and fuel price directly influence your total trip expense.
Scenario Comparison (A vs B vs C)
Each scenario represents a different driving setup. Scenario A can be your baseline car, while B and C can represent more or less efficient alternatives.
The tool compares total cost across all scenarios and highlights the cheapest option. It also calculates percentage differences so you can clearly see how much more you pay when consumption increases.
Visual bars help you quickly identify cost differences at a glance.
How Fuel Price Impacts Total Trip Cost
Fuel price has a multiplying effect on consumption differences. When fuel prices rise, the gap between efficient and inefficient vehicles becomes even larger.
This means that the same 2 L/100km difference can cost significantly more in one country compared to another. The tool helps you visualize this impact instantly.
Real-World Example (250 km Trip)
For a 250 km trip, the difference between 5 and 7 L/100km becomes very clear:
At €1.65/L fuel price:
- 5 L/100km → ~€20.63
- 6 L/100km → ~€24.75
- 7 L/100km → ~€28.88
This means the inefficient option costs over €8 more on a single trip. Over time, this difference scales dramatically.
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About the Author
I compared fuel consumption for 3 vehicles and the results surprised me.
Pretty useful for comparing fuel costs before choosing which car to drive.
Just compared my car with two others… the difference in trip cost is crazy 🚗⛽