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Duramax Diesel leaks Oil and Oil Consumption

My Duramax Diesel Leaks Oil 

 Measurement of Oil Consumption
Engines require a period of time to BREAK IN so that moving parts are properly seated. Therefore, oil economy should not be tested until the vehicle has accumulated at least 6400 km (4000 mi). An exception would be allowed only if an engine is reported to be using more than 0.946 liter (1 qt) in 1600 km (1000 mi).
1.Verify that the engine has no external leaks. Repair as necessary.
2.Verify that the engine is at normal operating temperature (see Owner's Manual or Service Manual).
3.Park the vehicle on a level surface.
4.Wait at least 15 minutes, after the engine is shut off, before checking the oil level to make sure that the oil has had time to drain back into the crankcase.
5.Verify that the oil level is at, but not above, the full mark on the dipstick, and that the proper viscosity and quality oil are being used as recommended in the Owner's Manual.
6.Record the vehicle mileage, date, and exact oil level on the form Vehicle
7.Ask the customer or yourself to verify the oil level, each time the vehicle is fueled, following steps 1-6 and return the vehicle to the dealership or private shop owner if the oil level is found at or below the add mark, 0.946 liter (1 qt) low. If the oil level remains above the add mark, the customer or yourself should continue to operate the vehicle and verify the engine oil level until 3200 km (2000 mi) has accumulated before returning to the shop for a final evaluation on your diesel vehicle.
8.If the final evaluation shows that the engine uses more than 0.946 liter (1 qt) in 3200 km (2000 mi), follow the published symptom diagnostics as described in the appropriate Service Manual or relate the information to your mechanic. If the oil consumption test shows that the engine uses less than 0.946 liter (1 qt) in 3200 km (2000 mi), explain to the customer that their engine meets the guidelines for oil consumption.

Aggressive Driving, High Speed or High RPM Driving
Aggressive driving and/or continuous driving at high speeds/high RPMs will increase oil consumption. Because this may not always be an everyday occurrence, it is hard to determine exactly how much the oil economy will be affected.
A higher rate of oil consumption is normal for vehicles equipped with manual transmissions that are driven aggressively. By "aggressive," we mean operation at high RPM (3,000 RPM to redline), with frequent use of engine braking (using the engine to slow the vehicle). Vehicles that are driven aggressively may consume engine oil at a rate of up to 0.946 L (1 quart) every 805 km (500 mi). This is normal for a vehicle that is driven aggressively. No repair is necessary. This characteristic does, however, require the owner to check the engine oil level at sufficiently frequent intervals, especially when driving aggressively, to assure the oil level remains within the recommended operating range, you should check the oil level every time you get fuel.

                                                        Diesel Consumption Card 
Toxic Diesel 866-488-6942
www.toxicdiesel.com
      

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