Hi all! For anyone playing with saves from v0.3, I am making a slight redesign of butane. Someone kindly noted that Butane is likely a more complex chemical compound than whatever Petroleum gas is. As a result, it would make more sense to crack butane into petroleum gas than the other way around (complex -> simple).

The change is exactly this, replacing petroleum gas cracking with butane cracking, plus Simple coal liquefaction on Vulcanus is changed to produce more Butane than Petroleum gas to make starting there a bit less annoying. A setting has been added to disable that, in case you have been relying on petroleum gas cracking and don't feel like redesigning your factory (I get it), as fortunately the required changes weren't actually that invasive.

Also I am shuffling the fluidbox indices slightly for oil refinery recipes, so keep that in mind!
The logic I'm using is as follows:
- Heavy oil is always prioritized at index 1
- Butane is prioritized at index 3
- Light oil is prioritized at index 2
- Petroleum gas is prioritized at index 1 (but lower priority than heavy oil)
Sour gas is a byproduct so it goes wherever is free

I'm getting insane amounts of butane currently, like 1 million while I'm completely out of sour gas with petro/suflur being fine with basic chemical plants setup on a new save I've started.

I'm really grateful you can turn Butane into Solid fuel as when using Hard Nauvis most of the ores are mixed so setting up enough coal mines for steam engines in the early game is extremely challenging.

But I don't know, maybe basic oil processing should give a little less butane, or that you get a little less solid fuel from it?

Either way appreciate the mod and all your hard work Saf!

Looking forward to 0.4.0 :^).

If you enable the new changes, you can then crack the butane into petroleum gas, which should solve that problem entirely! But I may reduce the amount of butane anyway depending on other feedback.

I don't know if it happens because I updated a game where I started on vulcanus and had oil processing already researched, but the recipe for butane to petro gas cracking recipe is not avaible in the chem plant and is not unlocked by any research, despite existing in the factoripedia. Also is it intended that Simple coal liquefaction outputs 99% * 0 Tar, making it no byproduct at all? I have all scrappy chemistry settings on, but also play with hard space age modpack and space age galore (that should not modify your recipes, just add new ones) if that matters

Nope I checked, when starting a new game with Scrappy Chemistry and Industry (and space age) and nothing else, there is no way to get butane cracking to petroleum gas

Oh oops this is a mistake on my part, I forgot to update the technologies to add butane cracking

This should be fixed in 0.4.1. On my end it's "99% Tar" from simple coal liquefaction, which is still 99% * 1 Tar implicitly. I've checked and this is the case with space age hard mode and galore enabled

Saf I actually take it all back!!!!!
Switched to using solid fuel from Butane and I'm nearly out from 1 mil down to 80k. XD

Don't listen to what I said earlier, if anything give us more butane!
I could use some more right now, having a hard time matching consumption versus production.

Thank you for the fix - and the 0 tar from simple liquefaction comes from the coal liquefaction nerv setting from Hard Vulcanus mod which seems to reduce output indiscriminatory, which I had enabled from before scrappy chemistry was a thing. Given that I like the ideas behind scrappy chemistry and already use it to make vulcanus harder, i simply have disabled that setting. Not sure if that interaction needs fixing

Hi CommonSnorkack, thank you for that insight! I'll speak with thesixthroc about how we should fix that

Fixed with 0.4.2! The setting is force-disabled since SC makes that part of vulcanus difficult enough as-is