We should save oil , or there won't be any left in the world.

我们应该节约用油，否则世界上就不会有油留下了。

youdao

We should save oil, or else there won't be any left in the world.

我们应该浪费用油，不然天下上就不会有油留下了。

youdao

We should save oil, or else there won't be any left in the world.

我们应该节约石油，否则世界上就不会有石油留下来了。

youdao

"Ethanol, by the time it's all said and done, almost doesn't save any oil, " Stedman said.

CNN: Ethanol: Is it friend or foe?

Stay away from the olives, avoid the goldfish, don't be picking at oily peanuts--you've got to save on oil wherever you can.

NPR: Eight Steps to Reducing Pain at the Pump

Their point: whatever money we save from lower oil prices, we should probably spend propping up our Arab oil friends.

FORBES: Leave It To The New York Times To Gin Up A Downside To The American Oil Boom