Additives, which are used to reduce wear and friction coefficient and are added into petroleum-based oils in various amounts, are known to be harmful rather than beneficial unless an appropriate working environment is used. It is critical that additives are utilized in the form of motor oil additives at the right time and in the right amount. This study aimed to determine wear performance of commercial borax® product by adding a borax additive into the system at various working temperatures. In this study, mineral oil was heated at three different temperatures (20a C, 50a C and 80a C) and wear performances were determined by adding commercially produced borax into mineral oil at these temperatures. It was seen that wear performance of commercial borax additive was not good at low temperatures. However, wear performance was better when the additive was added into the oil at temperatures higher than 50a C.