Contemporary challenges related to fossil fuels underscore the need for a transition towards sustainable alternatives, and one of the key innovative solutions lies in renewable energy sources such as fatty acid esters (FAE). Lubricants produced from FAE, including methyl (FAME) and butyl (FABE) fatty acid esters, open the door to prospective high-performance lubricant production. These esters are derived from natural resources such as vegetable oils and exhibit a smaller carbon footprint and less harmful environmental impact compared to conventional lubricants based on fossil resources. In this study, they were synthesized through the transesterification of rapeseed oil. Lubricants play a crucial role in maintaining the efficiency of machinery by reducing friction and wear, thereby extending their lifespan. However, traditional lubricants derived from fossil fuels are often associated with negative environmental impacts and climate change. Hence, research is directed towards developing more sustainable alternatives, and plant-based lubricating oils from fatty acid esters are becoming a promising option. In addition to satisfactory lubricity, the advantages of these lubricants include their environmental friendliness, biodegradability, and lower toxicity. FAEs are produced from renewable resources, reducing dependence on finite fossil fuel reserves and emissions of harmful gases, thus promoting energy sustainability and supporting the global transition to cleaner energy sources. The addition of polymeric additives to lubricating oils can yield a range of improvements in their properties. Among other things, these additives can enhance lubricity, low-temperature properties, and further extend the equipment's lifespan. This study is focused on investigating potential property enhancements of plant-based lubricants through the synthesis of various polymeric additives obtained via radical polymerization within fatty acid esters. For this purpose, methacrylic monomers DDMA (dodecyl methacrylate), ODMA (octadecyl methacrylate), and MMA (methyl methacrylate) were used in different ratios with the addition of a peroxide initiator. To assess the performance properties of the synthesized samples, such as viscosity, friction coefficient, pour point, lubricity, and other characteristics, a series of analytical methods were employed. These methods include nuclear magnetic resonance, differential scanning calorimetry, rheological testing, and gel permeation chromatography, the results and comparisons of which will be presented in the following sections of the paper.