The main catalytic technologies to produce environmentally friendly (low sulfur and low aromatic content) base oils from crude oil are the hydroisomerization of high molecular weight paraffins and the catalytic dewaxing. The goal of these technologies is to decrease the pour point of the oil with 10°-30°C and to increase the VI. With crude slack wax isomerization base oils with the highest VI, with catalytic n-paraffin conversion I-III class base oils can be produced. The results of hydroisomerization of wax from Hungarian crude oil on Pt/SAPO-11 catalyst were presented. The Pt/SAPO-11 catalyst was applicable to the hydroisomerization of Hungarian slack wax. The degree of hydroisomerization and hydrocracking changed with operational conditions. This is an abstract of a paper presented at the 16th International Colloquium Tribology Lubricants, Materials and Lubrication Engineering (Stuttgart/Ostfildern, Germany 1/15-17/2008).