Includes (6) 6450025S Engine Oil Bottles. Echo PowerBlend Gold 2-Stroke Engine Oil 6.4 oz Bottle 50:1 Mix for 2.5 Gallons of fuel. Echo PowerBlend Gold is a semi-synthetic blend 2-stroke engine oil that mixes at a 50:1 ratio with 89 octane or higher gasoline. Specially-formulate additives protect engine against rust, wear and corrosion and minimize exhaust port blockages. Fuel stabilizers allow mixed fuel to remain stable up to 1 month in a properly-sealed container. Compatible with the Following: