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.