An oligomerization method, comprising: a) contacting a C 4 to C 20 alpha olefin monomer and a catalyst system, the catalyst system comprising 1) a metallocene, 2) a first activator comprising a chemically-treated solid oxide comprising a solid oxide treated with an electron-withdrawing anion, wherein: the solid oxide is selected from silica, alumina, silica-alumina, aluminum phosphate, heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and the electron-withdrawing anion is selected from fluoride, chloride, bromide, phosphate, triflate, bisulfate, sulfate, fluorophosphate, fluorosulfate, or any combination thereof; and 3) a second activator comprising an organoaluminum compound having a formula: Al(X 10) n (X 11) 3-n wherein X 10 is independently a C 1 to C 20 hydrocarbyl, X 11 is independently a halide, a hydride, or a C 1 to C 20 hydrocarboxide, and n is a number from 1 to 3; and b) forming an oligomer product under oligomerization conditions; wherein the oligomer product has a pour point less than 0 °C. a) contacting a C 4 to C 20 alpha olefin monomer and a catalyst system, the catalyst system comprising 1) a metallocene, 2) a first activator comprising a chemically-treated solid oxide comprising a solid oxide treated with an electron-withdrawing anion, wherein: the solid oxide is selected from silica, alumina, silica-alumina, aluminum phosphate, heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and the electron-withdrawing anion is selected from fluoride, chloride, bromide, phosphate, triflate, bisulfate, sulfate, fluorophosphate, fluorosulfate, or any combination thereof; and 3) a second activator comprising an organoaluminum compound having a formula: Al(X 10) n (X 11) 3-n wherein X 10 is independently a C 1 to C 20 hydrocarbyl, X 11 is independently a halide, a hydride, or a C 1 to C 20 hydrocarboxide, and n is a number from 1 to 3; and 1) a metallocene, 2) a first activator comprising a chemically-treated solid oxide comprising a solid oxide treated with an electron-withdrawing anion, wherein: the solid oxide is selected from silica, alumina, silica-alumina, aluminum phosphate, heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and the electron-withdrawing anion is selected from fluoride, chloride, bromide, phosphate, triflate, bisulfate, sulfate, fluorophosphate, fluorosulfate, or any combination thereof; and the solid oxide is selected from silica, alumina, silica-alumina, aluminum phosphate, heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and the electron-withdrawing anion is selected from fluoride, chloride, bromide, phosphate, triflate, bisulfate, sulfate, fluorophosphate, fluorosulfate, or any combination thereof; and 3) a second activator comprising an organoaluminum compound having a formula: Al(X 10) n (X 11) 3-n wherein X 10 is independently a C 1 to C 20 hydrocarbyl, X 11 is independently a halide, a hydride, or a C 1 to C 20 hydrocarboxide, and n is a number from 1 to 3; and b) forming an oligomer product under oligomerization conditions;