For some reason, I have no access to the vanilla crude oil processing recipes? I can't turn crude oil into oil products. I started on Vulcanus with Any Planet Start, so maybe that's why? Both recipes are missing from the Oil Processing and Advanced Oil Processing techs, respectively.

I think they might be missing, not sure if that's an any planet start thing or not. But my question is, what do you need them for? Your question title says Aquilo, which is the only place crude oil is accessible, but generally you're using that directly in the solid and rocket fuel recipes with ammonia.

Either way, I guess if for whatever reason you wanted to do regular oil processing on Aquilo you should be able to do that, so maybe Aquilo discovery research should unlock them.

I would certainly like to have the option of using crude oil on Aquilo if I choose to, yes please! :D

Alright, I had to refresh my memory on why it was missing since the Any Planet Start compat is a little bit of a maze. I had removed both Oil Processing recipes from Planet Discovery Nauvis with APS installed. I did that because neither recipe is actually usable on Nauvis with Simple Seablock installed. However, as I said I agree that it's a perfectly reasonable thing to want the option to do Oil Processing on Aquilo, so with 1.5.2 (just released) I've un-removed those recipes from Planet Discovery Nauvis.

Thanks!