Saved myself head, oil return line, oil thermostat seal replacement with additive.



I'm over the moon, and don't have to yank my heads to replace that one small o-ring at the back of the engine beneath the heads!
Just shouting from the rooftops to potentially save someone an engine removal and/or front subframe drop.
Some people may disagree with my methodology, but I'd rather replace any other seal rather than have to pull my engine heads, lol.


