stupid question but: Do you know the chemical in the GL-5 that would erode the brass synchros as appose to the GL-4 chemical compounds?

IT says on the bottle:

"Meets Performance Requirments of API GL-4 and GL-5"

"Great for Manual Transmissions Requiring GL-4 or GL-5 Fluids"

"Contains limited split additive"


Any other feedback? Has anyone use this Royal Purple in their tranny??

Last edited by Joshua Mociak; October 20, 2009 11:42 pm UTC.
96 Talon TSi AWD - R.I.P