Why fuel and ammunition make a difficult combined auxiliary

Should naval auxiliaries combine every supply function in general-purpose ships?

Not when that means carrying major fuel and ammunition loads together; separating those hazards is safer and easier to manage.

A single auxiliary can sensibly combine some dry and liquid stores, but the answer objects to concentrating large fuel and ammunition loads in the same hull. Fuel and weapons impose different handling, storage, and replenishment demands on the crew. Managing both cargo systems together is described as a logistics problem rather than an automatic gain in flexibility. The preferred force therefore retains specialist auxiliaries where combining functions would make safe, efficient support harder.