Thread sealant is a thick substance that usually comes in a can. You can get it at the auto parts store. It usually has a threaded cap with a brush attached to it, just paint some on the threads before you screw them in. You don't need a massive amount on there, just enough to fill the threads.
I have a similar problem. I have 3500 miles on my car since I bought it, 23k total. It's a 2005. The low oil level warning came on the other day. I checked the dipstick and in fact it was low. Put a quart in and the level was good. I am not real happy this thing burns oil with 23k miles on it. I had a 1994 GP and it became a fill the oil and check the gas routine. A quart every 500. Any ideas on this one fellas? It's definitely not leaking it onto my garage floor.
I'm guessing GM will say that a quart every 3k is within spec. Then they'll remind me I'm out of warranty.
