This may have something to do with HT/HS viscosity at 150 deg C. The A3 specs call for greater than 3.5.
In the API specs, x(x)W30 oils only need to have 2.9. Even 0W-40, 5W-40, and 10W-40 only need 2.9. Note that this is the minimum so some API oils may have higher HT/HS.
15W-40, 20W-40, 25W-40 require 3.7.
From product sheets, it appears that Amsoil 0W-30 and 5W-30 have HT/HS higher than 3.5.
Bo
[ June 11, 2002, 01:48 PM: Message edited by: loubapache ]
In the API specs, x(x)W30 oils only need to have 2.9. Even 0W-40, 5W-40, and 10W-40 only need 2.9. Note that this is the minimum so some API oils may have higher HT/HS.
15W-40, 20W-40, 25W-40 require 3.7.
From product sheets, it appears that Amsoil 0W-30 and 5W-30 have HT/HS higher than 3.5.
Bo
[ June 11, 2002, 01:48 PM: Message edited by: loubapache ]