I purchased some STP (scientifically treated petroleum) in case you didn't know. It is Transmission slip stop+Leak.
I found it works well, HOWEVER,,- 1 SERIOUS issue I have is being blantenly lied to, by way of using the label of STP on the bottle, when IN FACT AND FOR A FACT, the product is indeed manufactured by Auto Zone, for Auto Zone but has a lable slapped on it by --wait for it,, A conglomerate company owning multiple other brands called Spectrum. No where does the company STP if even they still exist, I doubt it, have anything to do with the product itself ever. The thing that really pisses me off Is Auto Zone Customer service refused to and refuses to provide a list of products like this one, nor will they even admit that this is what they are doing rather than selling products they make with auto zone labels. Very sneaky, very milatious in my opinion.