There is, pump fuel to Railcraft iron tank and then put empty cell on it (I failed to automate it since I didn't know how to force tin cell to the GUI of it).
You can also pump fuel the quantum tank, and put empty cells to the "in" slot (I can automate the process by using advanced buffer and electric translocator haven't tried BC/RP2 pipes) .
You're my hero. <3 I can't afford a quantum tank yet, but a railcraft tank is totally on the table.