燃費

1. Origins, structure, and basic meaning

• Structure: 燃費, read ねんぴ, combines fuel use 燃 with expenditure 費 as the name of a fuel-efficiency measure.
• Basic usage: It describes fuel-use efficiency in expressions such as 燃費を比べる and 燃費が良い.

2. Common pitfalls and similar expressions

• Common combinations
  • 燃費が良い means traveling more efficiently on the same fuel, not that the fuel itself is inexpensive.