Speaking of Euro ACEA A3/B4 oil, in 5W40 or 0W40 grade, such as SHU 5W40 or M1 / Edge 0W40, all these oils are also rated Porsche A40 for use in their gas (petrol) engines.
Typical they are rated something like API SN / SN-Plus, ACEA A3/B3/B4, MB 229.5 / 226.5, BMW LL-01, VW 502/505 and Porsche A40.
The A3/B4 spec means TBN is above 10 for long life (full-SAPS), the MB spec means the Noack Volatility is below 10%, and every VOA / UOA I've seen of them show ZDDP at around 1000 ppm.
Overkill has posted a link to the Porsche A40 testing procedure
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3789194/
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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 "Nurburgring" 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 micron.
- Engine cleanliness and sludge: after 203 hours, no deposits must be visible.
- Bearing wear protection: visual rating according to Porsche in-house method.
Also Doug Hillary also said
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Yes, I can confirm that M1 0W-40 was being used by a number of Teams/Individuals at the last Nurburgring 24Hr events I attended
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3092233/1