Factorio Forums

I thought I saw in one of the blog posts that the fluid inputs and outputs can be changed on Oil Refineries. Is this possible? if so, how?

I searched through forums and Wiki and couldn't find any information about it.

Perhaps you're thinking of FFF 394, which announced that oil refineries (and other buildings) can now be flipped.

The default button to "flip" an entity is "h" when you have cursor over it, it will allow to have 2 refineries next to each other with their 2 petroleum output almost touching, and not heavy oil- petroleum.