An agricultural oil-based suspension formulation comprising an active ingredient suspended in finely divided form in an oil; and at least one surfactant selected from a polyalkylene glycol-fatty acid condensate or a polyalkylene glycolether fatty acid condensate formed from a reaction between a compound having Structure (1) and a compound having Structure (2): wherein R1=H or a C1-C30 alkyl radical; A and B are ethylene or propylene groups in succession or random; n=0 or >;1; and m=0 or >;1, and wherein n+m>;34; R2=C8-C30 alkyl or alkylene radical (branched or linear); and x=>;1.