Originally Posted by DanteB
I've been in the automotive industry for 35 years and unless otherwise noted by the manufacture we never oil threads to torque them.
I should qualify that statement, we never put “oil” on the threads. If we put anything on the threads we use anti-seize or a thread locker. The only threads we always lube are the stainless steel fittings we use on compressed natural gas vehicle and compressor stations. Stainless to stainless fittings gald when put together. We use nickel impregnated Teflon tape or liquid Teflon with nickel. The nickel acts as a lube to allow proper setting of the threads.