Airborne, grab some 0W40 (M1, lubro moly synthoil), 5W40 (castrol syntec, lubro moly synthoil, caterpillar deo, mutol 300V), 10W40 (amsoil amo), or 0W30 (castrol syntec made in germany). whichever one is easy to get, or cheap.
then at the 7500 mile mark, have some of the used oil analyzed to determine if you can run it for longer.
in order of personal preference, weighted against easy availability, i would go with M1 0W40, followed by Amsoil AMO, then Castrol 5W40. i wouldnt go over 7500 with the castrol though.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue