There's no way to unlock the Advanced oil processing and cracking as it requires barrels of light oil and barrels of heavy oil, which it unlocks in the first place!
Considering how long it will take for me to get to the point it matters, it's not a big deal, but it'd be nice if the required heavy and light oils were replaced with chemsci allotropes.

Good catch, I implemented a check that a technology does not require the "science item" from a recipe that it unlocks itself, but for fluids this was not done correctly. Fixed in 0.1.1