| 摘要 |
<p>A two component additive and a liquid hydrocarbon based fuel composition, containing the additive. The fuel composition is comprised of a major amount of a liquid hydrocarbon diesel fuel and a minor fuel efficiency improving amount of the additive. The additive is composed of: (A) an overbased transition metal salt of a carboxylic acid; and (B) a compound represented by general formula (II), wherein R1 and R2 are independently hydrocarbyl. The additive may include a third component (C) which is a hydrocarbon-soluble ashless dispersant. The dispersant (C) is preferably a derivative of a substituted succinic acid wherein the hydrocarbyl substituent is derived from a polyalkylene characterized by a Mn value of about 500 to about 10,000 and a Mw/Mn value of about 1.0 to about 4.0.</p> |
