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In this work the oxidative degradation of the synthetic fuel oxymethylene dimethyl ether (OME) was investigated. The main focus of this work is the degradation kinetics of OME under atmospheric conditions with a focus on storage stability. It was found that hydroperoxides have a detrimental effect on the oxidation stability of the fuel. The antioxidant butylated hydroxytoluene inhibited the degradation and led to a higher oxidation stability. The activation energy of the degradation was measured and was found to be similar to that of the degradation of polyoxymethylene (POM). The degradation products of OME were mainly formaldehyde, methanol, and formates. Side products were found to be carbonates and formic acid. These findings indicate that the oxidative degradation mechanisms of OME are closely related to those of the polymer POM.