Originally Posted by Ed_Flecko
Originally Posted by 1JZ_E46
Originally Posted by mightymousetech
Well that sucks.
Time to find a new oil for my fleet.
I hope Castrol reads this. They just lost my business (4-5 cases/yr), and I used to recommend this oil to all my friends.
Will probably switch to Motul 0W40.
Unless your cars are under warranty, I wouldn't think twice about using Catrol 0W-40, or M1 for that matter.
I agree! After all, the Castrol is still A40 approved!
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,
- 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.
Source:
https://bit.ly/2F7dRix
Ed
So is any decent xx-40 a3 oil. Example Mobil super 3000 x1 5w-40 and is very cheap too