The oxidation of PE precipitated from decane or chlorobenzene was studied in the presence of tetrakis[methylene-3-(3',5'-di-tert-butyl-4'-hydroxy-phenyl) propionate]methane at 180 o C by measuring the oxygen consumption. The efficiency of the antioxidant is higher on PE precipitated from chlorobenzene than from decane and, in both solvents, from the most diluted solutions. In addition, it has been seen that the decrease of the rate of PE precipitation gives rise to an increase in the stability of the polymer to oxidation. The changes in short-range-order arrangement of the macromolecules during precipitation are discussed.