I don't feel like that's a good idea, I would get annoyed all the time because it takes longer to craft the inserters from raw materials. Maybe as an option.

The solution to forgetting to replenish items are character logistic slots

Sorry for not responding, didn't really have time for factorio the last few days...

Layout is attached again. Oil comes through the tank my character is looking at, chemical plant to the south is creating lubricant (and you can see the tank attached at the output, which is NOT full), chemical plant ...

Anyone any idea on my problem?

What does solid fuel have to do with it? If you have to throw energy at the problem to get your advanced circuits and processing modules faster, throw energy at it.

You put beacons with speed modules in them next to the pump jacks. Since Oil is infinite, the increase in speed really is just that: an increase in speed (and power usage)

Of course. Problem is, the input is way to slow currently (I really need to hook up a few more oil wells), so the lubricant factory pauses a lot, but the cracking plant still gets stuff. I'll try what happens if I add a storage tank.

EDIT: doesn't change a thing. I don't get it...

I tried to set up priorities for my oil industries. I thought the setup visible in the attached screenshot should have the pump pushing everything first to the lubricant factory, only leaving liquid for the cracking plant if the former can't take anything right now, but the cracking plant still ...