The 2008 Ford Super Duty trucks equipped with the 6.4 Powerstroke engine stand out for significant reliability concerns. Owners frequently report costly 6.4 powerstroke problems including EGR cooler failures, radiator issues, and emissions system complications that lead to expensive repairs. Many experts recommend the 6.4 powerstroke to avoid due to these persistent diesel troubles that emerged shortly after launch. Later years saw some improvements, but 2008 models remain a high-risk choice for buyers seeking dependable performance.