Postby disallow » Tue Oct 16, 2012 8:56 am
On any imports, my opinion is its better to fix the leak.
However, I've driven a couple GM products (a 90 Lumina with 3.1 and a 2000 Grand Prix with 3800 Series II) and both benefited from the use of the Stop Leak Tabs you can buy directly from the dealer for $5. They are composed of walnut shells, ginger root, and some other weird stuff. Sounds weird, but I've heard they use these at the factory when their casting porosity gets to be an issue.
Have also had some good luck with Lucas Power Steering stop leak on the Grand Prix. Stopped leaking and solved the PS Pump noise issue I was having.
Another great reason to buy a Honda, Nissan, or Toyota. If you told one of their engineers to start doing this in their factory, they'd probably choke.