Translation of petroleum in Spanish

I was one time in Oxford. I'm studying social work in Austria. I'm living near Salzburg. It's in the middle of Austria. What are you doing in Oxford? Studying, teaching or working? Please stay in touch with me.
We arrived at the hotel which we booked in advance but decided not to stay there. Instead the driver convinced us to stay at the Borei Angkor Hotel. We were sure that he would get a sales commission.
Many thanks for your letter. I am delighted to tell you that I have passed my exams and am looking forward to the next year. Meanwhile I am planning a trip to Costa Rica and some places around there.