Echo 2.5 Gallon Mix of 2-Cycle Oil in 6.4 Ounce Bottles 6450025G REPLACES OEM# 6450025. Ultimate New and Improved, universal 2-stroke oil is manufactured exclusively for ECHO. As a result of extensive research, Power Blend GOLD 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.