Echo 5 Gallon Mix of 2-Cycle Oil in 12.8 oz Bottles 6450005. Ultimate, universal 2-stroke oil is manufactured exclusively for ECHO. As a result of extensive research, Power Blend XTended Life Oil: Is a semi-synthetic blend of oil certified for use in all air-cooled, 2-stroke, outdoor power equipment engines. Exceeds ISO-L-EGD and JASO M345/FD requirements. Has superior cleaning capabilities. Minimizes exhaust port blockage. Protects against rust, wear and corrosion. Provides low smoke emissions. Contains a fuel stabilizer that doubles fuel life.