Study results showed no measurable impact on B20 stability from the short- term, high-temperature HPCR stressing over the drive cycle used. High pressure fuel pumps showed no deposits or abnormal wear. By the end of long-term storage in hot, dry environment all fuels showed a measurable, but not problematic increase in peroxides and decrease in Rancimat induction period (IP). Results indicate that a 6 hr IP B20 can remain stable after exposure to HPCR conditions and subsequent storage for up to 6 months under the ambient conditions of this study.