The results of a study on the composition, structure, and possible application as an antioxidant additive of nitrogen bases isolated from a vacuum distillate of low-paraffin crude oil from the Neftyanye Kamni oil field are reported. The physicochemical and structural characteristics of the nitrogen bases were determined. A nitrogen base concentrate was tested as an additive for petroleum oils; its possible use as an antioxidant in the formulation of a turbine oil was shown.