6 Cylinder Oil Leaking at Exhaust Manifold
 

Have '98 6 1MZ-FE, 145k miles.

Found oil leaking out of two of the nuts that hold the rear exhaust manifold onto the head (no oil above or below the nut, it drips from the nut, to the bolt and fals onto the exhaust). Replaced the VC gaskets last month.

Did chemical test for hydrocarbon gasses in the radiator - turned out none present and no smoke out of exhaust. So, blown head gasket seems unlikely.

Is there an explanation for oil coming out of the exhaust manifold nuts other than a cracked head?

Is there a downside to trying oil leak additive?