[en] In this letter we present a cross-section set and transport properties for Ar⁺ scattering on CF₄ for relative energies up to 1000 eV. Monte Carlo simulation method is applied to accurately calculate transport parameters in hydrodynamic regime. We present new data for Ar⁺ ions in CF₄ as a function of reduced electric fields E/N (N-gas density) where the gas temperature $T_{\text{g}}$ is used as a parameter. Values of the reduced mobility are discussed. Discrepancy of reduced mobility for $T_{\text{g}}\to <!--\; ???\; -->0$ and $E\to <!--\; ???\; -->0$ from the polarization limit was previously theoretically considered but rarely measured especially in the presence of exothermic reactions. We find that internally resonant exothermic dissociative charge transfer cross-section for ${\text{CF}}_3^{+}$ production significantly increases zero-field ion mobility with respect to the polarization limit. (letter)