I guessed RP1 and LOX and that wasn't it. Oops. (It's what they use in the Merlin engine but not the Draco)
Anonymous
Apr 14, 2016
From all the documents that are available for the general public... RP/LOX is the fuel of the Merlin engine. SpaceX is working towards methane/LOX and Liquid Hydrogen (LH2) versions.... No mater what, they are getting the best thrust from the Merlin and can only get better.
They may have said you were wrong to see if you doubted yourself... humm