If a Holden Rodeo Turbo Diesel is using oil and new rings and a new turbo have been put in, it could be that the valves are leaking at the seals. Place a clean piece of cardboard under the vehicle overnight to see if it is leaking from the motor.
Coolant lines? Shift linkage? could also be the rear or front seals leaking
Replace the seals in it.
Check radiator hose, leaking water pump, look for hole in radiator, leaking coolant bottle or leaking seals.
Rear main engine seal or front transmission seals
The seals in the pump are leaking and the pump needs to be replaced.
switch to HPA, it is much better for the seals
Defective seals, and it needs replacing.
ceramic seals are used in many types of pumps, they prevent a liquid from entering into the motor or leaking out of a chamber
There is a heater hose that goes in the left rear back side of the intake manifold that hooks to a quick disconnect fitting, It is common for the fitting to leak antifreeze. If it is oil that is leaking, then there is a oil sending unit to the right of the distributor that could be leaking oil. There is a long rubber gasket that seals the back of the intake manifold to keep it from leaking oil also. That's all that could be leaking back there. GOOD LUCK.
leaking grease or cracks Looseness