I have had in the past these leaks since day one with my 1994 LQ 1. I lost a quart of oil every 1000 miles. That gets expensive when you are running Mobil one. . Earlier this year when I had both intake manifold gaskets replaced the mechanic replaced every exposed gasket possible while they were at it. They must have done something right, my disappearing oil problem is no more, it hasn't gone down a bit and that was 1500 miles ago.