fuel expenses; cost of fuel
Refers to the money spent on fuel, such as gasoline, heating oil, or other energy sources. Commonly used in household budgets, transportation, and business accounting.
This month's fuel expenses have increased.
To save on fuel costs, I'm cutting back on using the air conditioner.
ガソリン代 is specifically the cost of gasoline for vehicles, whereas 燃料費 is a broader term that can include heating oil, kerosene, and other fuels.
fuel cost adjustment
Compound of 燃料 (fuel) and 費 (expense, cost).