Quote:
Originally Posted by California Travieso
In other threads, some people who use STP in their transmissions have mentioned that it it is very difficult, if not impossible, to drain the stuff out of their transmissions.
If STP sticks to everything and cannot be removed without use of a solvent as has been mentioned in a post above, I would be concerned that it would clog the passage ways from the valve chamber so that oil would not flow very easily down to the mains, especially on startup of a cold engine.
David Serrano
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I can only speak from our experience with using STP for over 40 years.
There should be no problem at all draining STP from transmission. Stop and think about this for a moment. You can pour it out of the bottle “right”. Pours slowly, like 600w oil would.
It does not clog passage ways. It only leaves a coating on metal parts as a cushion. If your only using one bottle, as directions state, that’s 15oz. Your car will have 144oz of oil to 15oz of STP. That is a little more than 10% STP. At oil change, you add the STP to a warmed up engine. It mixes completely with your engine oil. It will however change your oils viscosity, making it higher by ? depending on weight oil you are using.
It does not pool at the bottom of an engines oil pan. STP mixes completely with your oil.
Everyone has there own view on using any product. Some of us use it and like it, some call it shake oil. To each his own.