The full tank method is often used to measure actual fuel economy. The full tank method calculates the distance traveled and the amount of fuel consumed starting from the car with a full tank of fuel until filling it up again.
Trip meter mileage ÷ Amount of fuel consumed = Actual fuel economy
STEP 1
Fill up the gas tank at a gas station
STEP 2
Reset the trip meter and start running
STEP 3
Drive long distances for averaging
STEP 4
Record the amount refueled
STEP 5
Calculate fuel economy
Demonstration test
Test Date: August 24, 2024
Vehicle: Nissan SYLPHY
Fuel Tank: 52 ℓ
We filled up the tank at a gas station in Kobe and set off, then refueled in Tottori, about 270 km away. After filling up with GEONE, we drove the same route from Tottori to Kobe, recorded the distance traveled and the amount refueled, and compared the fuel economy with gasoline only and after filling up with GEONE.
Going
From Idemitsu Self Sannomiya SS (Kobe) to Apollo Station Self Sakaiminato (Tottori)
Mileage: 269.30km
Amount of fuel: 14.21ℓ
269.30÷14.21 = 18.95km/ℓ
Returning
From Apollo Station Self Sakaiminato (Tottori) to Idemitsu Self Sannomiya SS (Kobe)
Mileage: 269.60km
Amount of fuel: 12.51ℓ
269.60÷12.51 = 21.53km/ℓ
Result
2.62km/ℓ Up
This means that a full tank of 52ℓ can run approximately 136 km longer.