[Olefin]

FYI - unrefined oil doesnt damage the engines of any ship unless they are USN ships that dont burn bunker fuel

ships have been using unrefined oil for decades and they burn it fine - so if the ships are older their engines will be working quite nicely on that kind of bunker fuel - however depending on where the fuel comes form they will need to have their boiler cleaned and overhauled a lot sooner than if they were using proper fuel

Also given how easy it easy to process bunker fuel oil for ships out of unrefined oil they might have been able to process some of it while the ships were waiting to be loaded (at least if you want to make bunker fuel - not talking gasoline here, I am talking low grade bunker fuel - i.e. residual oil - see the Med Cruise module for reference to how this can be done)

that was one place where the canon writers were wrong - but as none of them had any navy experience thats understandable - and it clearly shows that in how screwed up the Virginia versus Soviet ships encounter was written and other ways as well

so at least some of those ships they used for the evacuation will arrive in very useable condition on the East Coast