http://www.youtube.com/watch?v=BenQVR1Yw...=PL&index=1
Quote:
Porsche 996FL Engine test. This test will last 203 hours. The engine, and the oil, will go through: - 4 times the simulation of 35 hours of summer driving, - 4 times the simulation of 13.5 hours of winter driving, - 40 cold starts, - 5 times the simulation of 1-hour sessions on the “Nürburgring” racetrack, - 3.5 hours of “running-in” program Measurements on the engine and on the oil will be done at regular intervals, and the following parameter will be taken into account to grant the approval or not: - torque curve (internal friction), - oxidation of the oil, - Piston cleanliness and ring sticking, - Valve train wear protection. Cam & tappet wear must be less than 10 µm. - Engine cleanliness and sludge: after 203 hours, no deposits must be visible. - Bearing wear protection: visual rating according to Porsche in-house method. Several mechanics told me that they were relying on “their own testing” to choose an oil. None of these mechanics showed me that their method came close to matching what Porsche does: running dozens of oils through the same 203-hour test, and comparing the results. This test has been designed by Porsche to guarantee the availability of test-proven oils for all Porsche since model year 1973: the letter (attached) given to oil manufacturers specifies that date. This oil testing procedure exists specifically to avoid the wear cam problems created by the fiasco of ILSAC GF-4 being recommended in Porsche by some distributors.
The info. above was about using non-approved lubricants.
There are clearly other oils available that meet the Porsche specification and are as good or better then Mobil 1. OEM approvals are also important though, and engines are designed around certain lubricant performance as indicated from the video.
Quote:
Porsche 996FL Engine test. This test will last 203 hours. The engine, and the oil, will go through: - 4 times the simulation of 35 hours of summer driving, - 4 times the simulation of 13.5 hours of winter driving, - 40 cold starts, - 5 times the simulation of 1-hour sessions on the “Nürburgring” racetrack, - 3.5 hours of “running-in” program Measurements on the engine and on the oil will be done at regular intervals, and the following parameter will be taken into account to grant the approval or not: - torque curve (internal friction), - oxidation of the oil, - Piston cleanliness and ring sticking, - Valve train wear protection. Cam & tappet wear must be less than 10 µm. - Engine cleanliness and sludge: after 203 hours, no deposits must be visible. - Bearing wear protection: visual rating according to Porsche in-house method. Several mechanics told me that they were relying on “their own testing” to choose an oil. None of these mechanics showed me that their method came close to matching what Porsche does: running dozens of oils through the same 203-hour test, and comparing the results. This test has been designed by Porsche to guarantee the availability of test-proven oils for all Porsche since model year 1973: the letter (attached) given to oil manufacturers specifies that date. This oil testing procedure exists specifically to avoid the wear cam problems created by the fiasco of ILSAC GF-4 being recommended in Porsche by some distributors.
The info. above was about using non-approved lubricants.
There are clearly other oils available that meet the Porsche specification and are as good or better then Mobil 1. OEM approvals are also important though, and engines are designed around certain lubricant performance as indicated from the video.
