I have a 1999 STS with 143,000 miles. The car runs well but I have a couple of questions for the forum. There appear to be some minor oil leaks. Nothing on the garage floor but engine is a bit moist in some areas. Has anyone used "No Leak" or any other products with success? Also, what is the best way to flush the coolant system? Pull the thermostate and run a hose, fill with a flush and run, just empty and replace? Thanks.

Mark

Oh, by the way, the injectors have run rough in the past.I have had good luck using Tectron Fuel System Cleaner. Use it now about every 10,000 miles. Anyone have any other ideas?