Fuel crisis

A man was driving down the road and ran out of petrol.
Just at that moment, a bee flew in his window.

The bee said, " What seems to be the problem?"
"I'm out of petrol !!"
The bee told the man to wait right there and flew away.
After a few minutes, the man watched as an entire swarm of bees flew to his car and into his petrol tank.

A few minutes later, the bees flew out.
"Try it now, " said one bee.
The man turned the ignition key and the car started right up.

"Wow !" the man exclaimed, What did you put in my petrol tank?"
The bee answered, "B P."

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