The paper reports the results of Limiting oxygen index (LOI) measurements, thermogravimetric (TG) analysis and hot oil resistance (ASTM #1 and IRM 903 oils both at 150 degreesC) of silicone rubber, fluororubber based on tetrafluoroethylene/propylene/vinylidene fluoride terpolymer and their blends. Fluorosilicone rubber is included in the studies as a control. The results of LOI measurements reveal that the fluororubber has higher flame resistance than that of the silicone rubber, while the blends show flammability characteristics of the silicone rubber, which forms a continuous phase in the blend. As expected the fluororubber exhibits greater hot-oil resistance than that of the silicone rubber, but the blend of the two rubbers, when immersed in hot oil, shows retention of mechanical properties, which are either higher or in between that of the constituent polymers. The initial decomposition temperatures (corresponding to 3% mass conversion) of silicone rubber/fluororubber blends are higher than that of the constituent rubbers. It is evident that the flammability characteristics of the blends are determined by the blend morphology, while the blend composition and the interaction between the blend components control the oil resistance and the thermal stability of the blends. Fluorosilicone rubber behaves like silicone rubber in flammability, but in respect to oil resistance and thermal stability it is similar to that of the silicone rubber/fluororubber blends.