Turbo oil leak into engine - 2007 Toyota Quantum 2.7

Check exhaust smoke color when engine hot. If there is white smoke, there may be oil in the pipes. Means the valve seal is leaking oil into the cylinder. Another way to check is to look at the spark plug tips. If is full of soot like burnt oil then the oil is leaking into the cylinders.

If yours is E60 turbo, check the presence of residue oil in both the exhaust and intake turbine. If there is, the oil seals in the turbo housing is leaking oil. They do sell service kits for turbos.

there are two oil lines to the turbo
one line is a pressure line that delivers engine oil at pump pressure to the turbo
the other is a low pressure line that drains the oil back to the sump
determine which line is leaking and replace or fix and replace the gaskets or "O" rings

Does turbo need oil? Very much so. It has parts spinning at 30,000 rpms or so, and the bearings require oil to live. Clean cool engine thoroughly, and then run engine to find leak.

Do you have a external leak or does your engine oil drop but you can not see a leak. My S60 had a leak and it was from the return pipe from the turbo to the sump.You can remove the belly plate and look from the bottom at the back off the engine.You will see the return pipe at the bottom of the turbo. If it does not leak at the there the turbo might be worn and it is blowing the oil into the intake.To check remove the intake hose and check for excess oil in the intake system.

hi it is most likly the oil return from your turbo that is leaking ther is a gasket betwen the turbo and the oil return line that is leaking on your car. God iuck an come back to me if you nead more help. Hans

A new turbo charger is about $340, but you can buy the bearings and seals and rebuilt if yourself for about $100
http://turbosandparts.com/
It is not hard, and it does not take long to do.

I normally do not bother with synthetic, but with a turbo charger, it might be worth it. What really seems to ruin turbo chargers the most is not letting them cool off before parking.
Once you turn off the engine, there is no longer any cooling, so the build up heat will burn up the oil and seals.
Run the engine for at least 5 minutes below turbo levels, before shutting down the engine.

you've either got low engine oil, or the sensor has gone bad, or you have a leak somewhere. The leak may not be visible if it's leaking into another part of your engine or into the transmission via the rear engine seal

Diesels do lose a little oil out the blow-by tube. If the engine temp. is higher then normal then you will lose more then normal amounts. If you are not leaking it then you are burning it, Possibly worn rings, head-gasket, or oil leak inside turbo. 68 MPH and higher doesn't sound unusual, is the engine still stock?

check turbo oil return pipe make sure it not clogged up .make oil pipe to turbo not leaking oil.

sounds like the turbo oil seal is leaking, this would account for not seeing any smoke.