
My expectation is that any of those fluids mentioned would be good here. I also agree with Al it seems wise to drain the system to eliminate the 3309 mix just so you know what you have in there. I would probably first try a synthetic without stop leak (just because my habit is to add stop leak products if I don't have to), although knowing that if it still leaks with synthetic you will have to throw it away and try the stop leak.






