Use of lubricating compositions to improve the cleanliness of a 4-stroke vehicle engine

Abstract

The invention relates to the use of an alcohol of formula R—OH (I), in which R is a linear or branched saturated alkyl group with 10 to 36 carbon atoms, in a lubricant composition to improve the cleanliness of a 4-stroke vehicle engine.

1 . A method for improving the cleanliness of a 4-stroke vehicle engine comprising the lubrication of the engine with a lubricant composition comprising an alcohol of formula (I)
   R—OH   (I)
   where R is a saturated, linear or branched alkyl group having 10 to 36 carbon atoms, in a lubricant composition to improve the cleanliness of a 4-stroke vehicle engine.   
     
     
         2 . The use according to  claim 1 , wherein the alcohol is selected from among the compounds of formula (I)
 where R is a saturated, linear or branched alkyl group having 12 to 36 carbon atoms.   
     
     
         3 . The method according to  claim 1 , wherein the alcohol is selected from among the compounds of formula (Ia)
   R 1 —C(R 2 )(H)—CH 2 —OH   (Ia)
   where R 1  and R 2  are saturated, linear or branched alkyls selected so that the compound of formula (Ia) comprises 10 to 36 carbon atoms, preferably 12 to 36 carbon atoms.   
     
     
         4 . The method according to  claim 1 , wherein the lubricant composition comprises at least one base oil. 
     
     
         5 . The method according to  claim 1 , wherein the lubricant composition comprises from 0.1 to 10 weight %, preferably 0.1 to 4 weight %, more preferably 0.2 to 3 weight %, advantageously 0.3 to 2.5 weight % of alcohol relative to the total weight of the lubricant composition. 
     
     
         6 . (canceled)