I somehow doubt that; radials use gallons, not the odd pint of oil. I looked good and hard at those "bottles" and felt they were probably controls of some sort, the kind of beefy things you'd need to move flapper valves to direct air to one ballonet or the other perhaps?
We need an airship expert's help, I'm intrigued.
"Carry on, Number One!" (And with sincere sympathy to our deprived Colonial cousins, me, I'm off to the Wardroom for a quick sharperner.)