The renewable synthetic fuels produced from this technology offer several advantages over other renewable and petroleum-based diesel fuel, including higher cetane levels, significantly less NOx, near zero sulfur, and superior thermal stability. The unblended synthetic fuel can be used in existing diesel engines with no engine modifications required. The product can also be upgraded into ultra-clean, high quality synthetic jet fuel, allowing for advanced military aviation applications. Further, the synthetic fuel may be blended with petroleum based diesel and/or conventional biodiesel to help those fuels achieve superior environmental and performance characteristics.