This is the 10152nd most frequent Russian word.
бензина
"Бензина" is the genitive singular form of "бензин," meaning "gasoline" or "petrol" in English.
The word 'бензина' is used as the genitive case of 'бензин' to indicate an unspecified quantity of gasoline.
Мне нужно купить немного бензина.
I need to buy some gasoline.
Here 'бензина' is the genitive case of 'бензин' describing the smell's source.
Запах бензина наполнил гараж.
The smell of gasoline filled the garage.
In this sentence, 'бензина' is used in the genitive case to specify the requirement of gasoline.