A5 = Stable, stay-in-grade oil intended for use at extended drain intervals in high performance gasoline engines designed to be capable of using low friction, low viscosity oils with a HT/HS of 2.9 to 3.5 mPa.s. These oils may be unsuitable for use in some engines. Consult owner manual or handbook if in doubt.
I don't think any conventional oil can be classified as "stable, stay-in-grade and suitable for extended drain intervals...ie. 10k mi. or more.
I've got about a dozen conventional oil spec sheets I've printed out over the last year, major brands like Pennzoil, Chevron, Valvoline, Kendall, etc.
Although they list any number of certifications (SL, ILSAC, military, Ford/GM/DaimlerChrysler, etc.), not one of the spec sheets mentions meeting ANY ACEA European specs. But spec sheets for "diesel" oils Chevron Delo 400 and Pennzoil Long Life (and probably some others as well) mention ACEA E3 and E5 certification, whatever that is.