What kind of oil to use in the echo weed eater?

For an Echo weed eater, it's recommended to use a high-quality 2-stroke engine oil that meets the ISO-L-EGD and JASO FD standards. Echo specifically suggests using their own brand of 2-stroke oil for optimal performance. Always mix the oil with fresh gasoline in the correct ratio, typically 50:1 (2.6 ounces of oil per gallon of gasoline), unless specified otherwise in the user manual.