gasoline

I fill it up.

私は入れます

I fill it up before I leave on a trip.

私は旅行に出る前に入れます

I fill it up at a nearby gas station before I leave on a trip.

私は旅行に出る前に近くの給油所で入れます

I fill up my car at a nearby gas station before I leave on a trip.

私は旅行に出る前に近くの給油所で自動車に入れます

I fill my car with gasoline at a nearby gas station before I leave on a trip.

私は旅行に出る前に近くの給油所で自動車に揮発油を入れます