# How to do the fuel consumption test?

There two types of tests. Fuel consumption in city and Constant speed fuel consumption:

## Fuel consumption in city

The average fuel consumption, driving **only in city**. How to do this test?

- Fill the tank (full) and write the actual mileage in the car (
**km1**)
- Drive
**only in the city**.
**After few days** again fill the tank and write the used fuel (**L**) and new actual mileage in the car (**km2**).
- Calculate the fuel consumption, for example:

Distance **D** = **km2**-**km1** [km]

Fuel consumption = **L×100/D** [L/100km]

If you use different units, you can use this: Fuel consumption calculator.

## Constant speed fuel consumption

Fuel consumption driving with **constant speed**. How to do this test?

**• If you have instantaneous fuel consumption (current fuel economy) on the dashboard:**

- Drive with constant speed and write down the fuel consumption, for example:

**70 km/h** (43 mpg) => 6.5 L/100 km

**90 km/h** (56 mpg) => 7.0 L/100 km

**110 km/h** (68 mpg) => 8.0 L/100 km

**130 km/h** (81 mpg) =>10.0 L/100 km

*If your dashboard shows other units (not L/100 km or mpg), you can use this: Fuel consumption converter*

*You don't have to do the test for all four speeds.*

**• Or if you don't have instantaneous fuel consumption on the dashboard:**

∼Constant speed
- This test can be done if you have posibility to drive with nearly constant speed between
**two gas stations**.
- Fill the tank (full) and write the actual mileage in the car (
**km1**)
- Drive with nearly
**constant speed** to next gas station
- Fill the tank and write the used fuel (
**L**) and new actual mileage in the car (**km2**).
- Calculate the fuel consumption, for example:

Distance **D** = **km2**-**km1** [km]

Fuel consumption = **L×100/D** [L/100km]

If you use different units, you can use this: Fuel consumption calculator.

Avoid driving uphill or downhill during constant speed test.

Avoid very windy days for constant speed test.