Echo Red Armor® 6550050 1 gal 50:1 2 Cycle Oil Mix. Manufactured with performance and ultimate protection in mind, ECHO's Red Armor® Oil is a premium 2-stroke engine oil for professionals and homeowners who want a high grade, high performing oil that promotes longer engine life, cleans existing deposits, and protects against future carbon build-up. ECHO's Red Armor® Oil is an exclusive formula that includes powerful detergents to remove performance-robbing caked on deposits and carbon upon first use, while our special additives help to protect your engine and components from future build-up and fuel stabilizers to help keep fuel fresh for up to 2 years in a properly sealed container.