Reach Salwa road border , travel to Abudhabi if you take right from Abudhabi can take Al Ain Border or travel to Dubai take Emirates road take right to Oman road Al Ain- Buraimi- Ibri- Nizwa- Izki- Seeb(If you need From Seeb You can take Turn to go to 1000 KM Ahead Salalah) Muscat. Nizwa Seeb roads are now double roads. beware of Sandy winds and camel. People are very nice (Pure Omanis)Expats i dont know.