Additive compositions and to fuel oils

An additive composition comprises a polymer (A) and a condensation product (B). Polymer (A) comprises the following monomer components: (i)one or more compounds of formula; (ii) one or more compounds of formula (II); and (iii) one or more compounds of formula (III). Condensation product (B) comprises the product formed by the reaction of an aliphatic aldehyde or ketone, or a reactive equivalent, with a substituted phenol or mixture of substituted phenols. The weight:weight ratio of the polymer (A) to the condensation product (B) is from 1:20 to 20:1 本发明添加剂组合物包含聚合物(A)和缩合产物(B)。聚合物(A)包含以下单体组分：(i)种或多种式(I)化合物；(ii)种或多种式(II)化合物；和(iii)种或多种式(III)化合物。缩合产物(B)包含通过脂族醛或酮或反应性等价物与取代苯酚或取代苯酚的混合物反应而形成的产物。聚合物(A)与缩合产物(B)的重量:重量比为1:20-20:1。