Oil in Propane

You should make no assumptions that “because it feels like oil and looks like it must be oil”, this is not how it works...Why??.... Because during the final stage of finishing commercial LPG treatment, the LPG undergoes a caustic treatment (sodium hydroxide) to remove ‘trace amounts’ of sulfur, then a water wash prior to commercial shipment.

The possibility of an occasional slight caustic carryover exist (due to a process upset), and any sodium hydroxide carryover looks and feels exactly like oily lubricant, thus the immediate impulse to call it oil...You might try a piece of p/h test paper to confirm.

Also, caustic is similar to acid because of it’s corrosiveness to components.

3 tons