Abstract

By esterification of corresponding acids and alcohols, polyol ester of pentaeritritol–tetra–oleate (PETO) and diester of dioctyladipate (DOA), were synthesized. Each synthesis was confirmed through the comparison of some important physical and chemical properties of obtained adducts, with those of reported values. Following this step, three blends of PETO and DOA were prepared and their important physical properties were evaluated. Due to desirable physical properties, of a PETO: DOA mixture, with 32:68 weight ratio, it was assigned as the suitable one and named as Synester F4. This new group (V) esteric base oil was employed for production of two motor oils with standard 15W40CH4. The application of produced oils in two diesel engines was successful.

Key words: Synthetic base oils, polyol ester, diester, PETO, DOA, viscosity index, fash point, pour point, 15W40CH4.