Echo Original Equipment Red Armor 2-Cycle Engine Oil (2.6 fl oz Bottle) - 6550001 The Echo 6550001 Red Armor 2-Cycle Engine Oil is a premium semi-synthetic blend specifically designed for 2-stroke or 2-cycle engines. This high-performance oil is engineered with ultimate protection in mind, catering to both professionals and homeowners who require a high-grade, high-performing oil that extends engine life, cleans existing deposits, and shields against future carbon build-up. The blend comes in a 2.6 fl oz bottle, which is ideal for individual use or small tasks, making it a practical choice for various outdoor power equipment needs. The oil is sold individually or in multipacks, offering a cost-effective solution for users with different consumption needs. This is an OEM Echo part.