It takes roughly 23-24 minutes to run through 1 barrel of diesel with player-owned pump jacks. The static quarries around the map run 1 barrel of diesel in 2 minutes and 10 seconds (roughly).

Can we get a fix for this?

I have the same problem.
Tried to unload Backpumpjack and its still the same issue.

So i suspect there is a problem from facepunch side and not the plugin.

This appears to still be an issue.

should be fixed now

Great.... gonna test it later