Appeal No. 97-0455
Application No. 08/344,043
(B) at least one Mannich dispersant, amine dispersant,
nitrogen-containing carboxylic dispersant, or ester dispersant;
said composition further comprising:
(C) an amount, sufficient to reduce degradation of the
lubricant composition upon exposure to oxygen or to
oxides of nitrogen, of an aromatic amine inhibitor;
said composition containing 0 to about 3 percent by weight bright
stock;
provided said composition is substantially free from ash-forming
components and from added phosphorus-containing components.
21. A method of lubricating a direct fuel injected, crankcase-scavenged two-
stroke cycle engine, comprising
(a) supplying to the crankcase of said engine
a composition of at least one oil of lubricating viscosity;
an amount, sufficient to reduce or prevent piston scuffing,
of a mixture of
(A) at least one phenol selected from
(A-1) an aminophenol and
(A-2) a reaction product of a nitrophenol
and an amino compound; and
(B) at least one Mannich dispersant, amine
dispersant, nitrogen-containing carboxylic
dispersant, or ester dispersant;
said composition further comprising:
(C) an amount, sufficient to reduce degradation
of the lubricant composition upon exposure to
oxygen or to oxides of nitrogen, of a nitrogen-
containing inhibitor, a hindered phenol inhibitor,
or a sulfur-containing organic inhibitor; and
(b) operating the engine.
35. The method of claim 21 wherein the lubricating composition contains 0 to
about 3 percent by weight bright stock.
36. The method of claim 21 wherein the lubricating composition is free of
bright stock.
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