Originally Posted By: BrianWC
Originally Posted By: c3po
Do we have someone who can post from experience using any of these stop leak additives.
Sure, I tried a bit of a lucas-like additive in both my tranny and my engine at different times. Never worked one bit on either. Both issues were not something a mere higher viscosity oil could stop. Engine issue was from excessive PCV pressure pushing out on a seal. Once I replaced the PCV, it did stop. The tranny issue ended when I had a shop tighten the connections to the tranny cooler. Moral of the story is while yes, sometimes there are those crazy odd voodoo leaks something like arx could fix, many times there are mechanical issues at paly that need repair.
That's why I replace my PCV every year on my small block chevy, $3.00 is cheap insurance to me.