The Hubologists need fuel for their spaceship

The Hubologists need fuel for their spaceship is a quest in Fallout 2.

Walkthrough
You can find fuel if you have a hardened power armor which can be obtained from Crocket in the Hubologist base, inside the Steel Palace by speaking to Dr. Jing Tie Gahng. He will exchange the hardened power armor for fuel, and ask for three options :
 * Deliver the fuel to Oil Tanker.
 * Deliver the fuel to Hubologists base.
 * Cash it for $20.