The purpose of this study is to determine the causality between global oil prices and the trade deficit of Turkey in the period 1969 to 2018. For this purpose, along with the Hacker and Hatemi-J bootstrap symmetric causality test, the time-varying causality test, which is also defined as rolling windows in the literature, was applied. As a result of the analysis, no causality was found for the entire period. However, according to the results of causality that changed over time, only in 1998, the causality from foreign trade deficits to global oil prices was determined at a significance level of 5 percent. This study will make a methodological contribution to the literature on the subject. In the framework of the results, the increased application of energy-saving policies is considered necessary in Turkey. In this context, alternative energy production (solar, wind, etc.) should be used, especially in the industrial sector, electricity-powered automobile production should be accelerated, and the society should be conscious about minimizing individual energy consumption.