NOLATrav said:Militaries train their personnel to mitigate risks.
As far as fleet movements, there’s canonical precedence that military vessels can use unrefined fuel without penalty. Specially tuned drives or something, goes back to 80’s era CT. So there’s that, but I don’t use it IMTU.
I like a gritty, rough’n’tumble feel to space travel and fuel processors everywhere make it feel safe and mundane. Obviously YMDV
J-Drives specifically designed for unrefined fuel would be a good way to do it as well. Price them so that they are never economical to use and therefore only used by polities and/or megacorps on very select vessels. Then you get your rough and tumble feel, because Travellers will rarely be able to afford such a J-Drive as long as you control their cash flow... One idea could be decreasing the monthly maintenance period from every month to every month + every jump, or every month + every parsec jumped. That way using a J-Drive designed for unrefined fuel would have sky-high maintenance costs and require maintenance to be performed after every jump as described in a lot of CT material.