pretty simple fix but the mod 4x the amount of oil used in them, but the upgraded version don't change at all

Howdy!

Not much I can do with it on my side of things as the mod author is only specifically targeting one specific turret, that being the flame thrower turret. This mod creates a turret per rank. So there is a flame thrower turret rank 1, flame thrower turret rank 2, etc.

I see a setting in the Flamethrower turret rebalance mod that should fix your issue. Turn on the setting in Flamethrower turret balance called "Apply to all fluid turrets".

ok, thanks!