@Snwwhtssei See below on why Porsche A40 is important enough spec that so many people brought it up already. An oil has to be REALLY stout to get that certification.
Here is Porsche A40 testing procedure:
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, A full lap of the Nordschleife, bypassing the modern GP track, is 20.832 km (12.944 mi) long. A stock Chevrolet Corvette C5 has a lap record at Nurburgring @8:40, stock Honda S2000 has a record@8:39, and stock Honda NSX is @8:38. Considering these numbers, this Porsche A40 simulation is equal to 80-90 miles of flatout track use. Or 100-120 miles if you drive Porsche 911 GT2 R with its lap record @6:38.
- 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.
One more thing for comparison. Just a rough idea of how the numbers stack up. Take everything with a grain of salt.
Most daily driven cars have an average speed (over the course of an OCI) of about ~35mph. That would make the 203hr test an equivalent to 7,105 miles of driving.
Assuming the average speeds are higher, let's say 50mph, and the 203hrs are now equivalent to 10,150 miles of driving.
Here is Porsche A40 testing procedure:
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, A full lap of the Nordschleife, bypassing the modern GP track, is 20.832 km (12.944 mi) long. A stock Chevrolet Corvette C5 has a lap record at Nurburgring @8:40, stock Honda S2000 has a record@8:39, and stock Honda NSX is @8:38. Considering these numbers, this Porsche A40 simulation is equal to 80-90 miles of flatout track use. Or 100-120 miles if you drive Porsche 911 GT2 R with its lap record @6:38.
- 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.
One more thing for comparison. Just a rough idea of how the numbers stack up. Take everything with a grain of salt.
Most daily driven cars have an average speed (over the course of an OCI) of about ~35mph. That would make the 203hr test an equivalent to 7,105 miles of driving.
Assuming the average speeds are higher, let's say 50mph, and the 203hrs are now equivalent to 10,150 miles of driving.
