premium grade gasoline

例句：

1. 1. The premium grade gasoline is much more expensive than regular gasoline.
   高级汽油比普通汽油贵得多。
2. 2. The car's engine needs a premium grade gasoline to run properly.
   这辆车的引擎需要用高级汽油才能正常运行。
3. 3. We should always use premium grade gasoline in our cars to ensure they run smoothly.
   我们应该始终使用高级汽油来确保我们的汽车运行顺畅。