@Jim Kelly posted:Subaru conditioner is Holt's Radweld, rebadged for Subaru. It's basically another type of Barr's Stop Leak, actually designed for model years 2006 and older.
Yes, it's basically a leak stopper, but it's recommended by Subaru. I use it in our older Subaru Impreza, but I know of others that use it in newer ones.