(19)
(11) EP 0 320 279 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.09.1989 Bulletin 1989/37

(43) Date of publication A2:
14.06.1989 Bulletin 1989/24

(21) Application number: 88311672.5

(22) Date of filing: 09.12.1988
(51) International Patent Classification (IPC)4: C10M 133/04, C10M 133/06
// C10N40:04
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 09.12.1987 US 130524

(71) Applicant: EXXON RESEARCH AND ENGINEERING COMPANY
Florham Park, New Jersey 07932-0390 (US)

(72) Inventors:
  • Feldman, Nicholas
    Woodbridge New Jersey 07095 (US)
  • Vardi, Joseph
    Demarest New Jersey 07627 (US)
  • Beltzer,Morton
    Westfield,New-Jersey 07090 (US)
  • Habeeb,Jacob Joseph
    Westfield New Jersey 07090 (US)

(74) Representative: Fletcher Watts, Susan J. et al
ESSO Engineering (Europe) Limited, Patents and Licences, Mailpoint 72, Esso House, Ermyn Way
Leatherhead, Surrey KT22 8XE
Leatherhead, Surrey KT22 8XE (GB)


(56) References cited: : 
   
       


    (54) Engine lubricating oil composition


    (57) The composition comprises a major amount of engine lubricating base oil and a minor amount of certain quaternary ammonium hydroxides. Reduces octane requirement increase in spark ignition internal combustion engines and reduces oil consumption in diesel engines. Tricaprylmethyl ammonium hydroxide is a preferred additive.







    Search report