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01-06-01-011H Information on Engine Oil Consumption Guidelines - (Oct 29 2013) Engine Lubrication - part 3

Rating:
Verifythat all cooling system components are in proper working order.

Engine Wear

Piston scuffing, excessive piston-to-wall clearance, tapered or out of round cylinders,worn, damaged or improperly installed valve guides, seals and piston rings will allcause an increase in oil consumption.

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 least6400-km (4000-mi). An exception would be allowed only if an engine is reported tobe using more than 0.946-liter (1-qt) in 1600-km (1000-mi).

Verify that the engine has no external leaks. Repair as necessary.Verify that the engine is at normal operating temperature (see Owner's Manual or ServiceManual).Park the vehicle on a level surface.Wait at least 15-minutes, after the engine is shut off, before checking the oil levelto make sure that the oil has had time to drain back into the crankcase.Verify that the oil level is at, but not above, the full mark on the dipstick, andthat the proper viscosity and quality oil are being used as recommended in the Owner'sManual.Record the vehicle mileage, date, and exact oil level on the form included in thisbulletin.Ask the customer to verify the oil level, each time the vehicle is fueled, followingsteps 1–6 and return the vehicle to the dealership if the oil level is found at orbelow the add mark, 0.946-liter (1-qt) low. If the oil level remains above the addmark, the customer should continue to operate the vehicle and verify the engine oillevel until 3200-km (2000-mi) has accumulated before returning to thedealership for a final evaluation.If the final evaluation shows that the engine uses more than 0.946-liter (1-qt) in3200-km (2000-mi), follow the published symptom diagnostics as described in the appropriateService Manual. 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 guidelinesfor oil consumption.Oil Economy Test — Data Sheet

Dealer Name: _________________________________

Customer Name: _________________________________

Phone: (___)____-_______ Phone: (___)____-_______

VIN: ____________________________

Oil Type Used: ____________________

R.O. #: ___________________

Step

Date

Mileage

Oil Level

Driving Conditions

(City, Highway, Both)

1

-

-

-

-

(Start of Test)

2

-

-

-

-

3

-

-

-

-

4

-

-

-

-

5

-

-

-

-

6

-

-

-

-

7

-

-

-

-

8

-

-

-

-

9

-

-

-

-

10

-

-

-

-

11

-

-

-

-

12

-

-

-

-

GM bulletins are intended for use by professional technicians,NOT a "do-it-yourselfer".  They are written to inform thesetechnicians of conditions that may occur on some vehicles, or toprovide information that could assist in the proper service of avehicle.  Properly trained technicians have the equipment,tools, safety instructions, and know-how to do a job properly andsafely.  If a condition is described, DO NOT assume that thebulletin applies to your vehicle, or that your vehicle will havethat condition.  See your GM dealer for information on whetheryour vehicle may benefit from the information.

#01-06-01-011H: Information on Engine Oil Consumption Guidelines - (Oct 29, 2013) Engine Lubrication

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