The application of independently developed polymethyl methacrylate type adhesive (PMA) in a continuously variable transmission oil (CVTF) was studied,and the viscosity temperature performance and friction characteristics were compared with imported similar products.The results show that when the viscosity temperature performance is the same,the steel-steel friction performance of the independently developed PMA-3 is roughly equivalent to that of imported similar products,but the paper-steel friction characteristics (anti-shudder durability) are better than the imported agent,indicating that PMA with different molecular structures can affect the anti-shudder performance of the CVTF formula system.This may be due to the varying degrees of influence of PMA with different molecular structures on the frictional chemical reaction rate between P containing friction modifiers and Ca containing detergents in CVTF,resulting in different coverage rates of friction films formed on the friction surface of steel discs,ultimately resulting in different paper steel friction characteristics of each oil sample.Due to significant differences in friction mode and severity scale between paper-steel and steel-steel friction tests,the composition ratio of P-Ca friction film may vary,and further exploration is needed.