| abstract |
IN ACCORDANCE WITH THE INVENTION, LUBRICATING OIL COMPOSITIONS WITHOUT ASH FOR DIESEL ARE PROVIDED IN SEVERE CONDITIONS OF SERVICE, WHICH CONSISTS OF A LUBRICANT VISCOSITY OIL, AS A SECONDARY COMPONENT FOR LOMENOS 3% BY WEIGHT OF AT LEAST SULPHINE , AND (C) AT LEAST 0.1% BY WEIGHT OF, AT LEAST, AN ORGAN - SULFURATED COMPOUND OF FORMULA (I), WHERE R4 AND R5 ARE RECTORS OF STRAIGHT OR BRANCHED CHAIN, ALKYCLES, ALICYCLIC, ARYL, ALKYL, OR YARKS WHICH HAVE BETWEEN 2 AND 30 C, YWYZ ARE NUMBERS INCLUDED BETWEEN 1 AND 8 AND WHERE THE LUBRICATING OIL IS CHARACTERIZED BY A TOTAL SULFATE ASH LEVEL (SASH) OF LESS THAN 0.01% IN WEIGHT. |