| abstract |
(57) [Summary] (Correction) [Purpose] To bring out the full performance of MoDTC and The deterioration of DTC itself is suppressed, and MoDT can be used even when oil deteriorates. An object of the present invention is to provide an engine oil composition which has a high residual C content and therefore provides low friction and low wear over a long period of time and leads to fuel saving. An engine oil composition comprising molybdenum dithiocarbamate of the general formula 1, zinc dithiophosphate of the general formula 2, and an engine base oil as essential components. (R 1 , R 2 , R 3 and R 4 are the same or different C8 To 16 alkyl groups, X is S or O, S / O ratio is 1/3 to 3/1) Zn [(RO) 2 PS 2 ] 2 ยท aZnO (2) (a is 0 or 1/3, R is an alkyl group of C 3 to 14) Where R may be the same or different) |