STS turbo oil leak.
More than likely, the check valve is bad. Just take the steel braded line off; take the check valve off(3" brass cylinder on top of the turbo); put the valve back on the line and start the car until oil flows and turn it off. After a minute or two, it should not drip anymore. If it does, it is dripping into the turbo as the car/truck sits and running into the compressor and turbine sides.
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