Abstract:
The present teachings relate to fuel additives useful for reducing and/or preventing the formation of intake valve deposits. The fuel additives include cyclic Mannich products prepared by the reaction of (A) a substituted hydroxyaromatic compound, (B) a formaldehyde source, and (C) a primary amine.
Abstract:
There is disclosed herein a gear additive composition including a nitrogen-containing compound and a phosphorus-containing compound, wherein the ratio of total base number to total acid number of the gear additive composition is greater than about 0.94. There is also disclosed a gear lubricant composition having the disclosed gear additive and a reaction product of a sulfur-containing compound, a phosphorous-containing compound, and a nitrogen-containing compound. Methods of using both compositions are also disclosed.
Abstract:
A lubricating composition including a viscosity index improver and at least one of a sterically hindered sulfur-containing, phosphorus-containing compound, and its salt is disclosed.