Suzuki DF4 DF6 Service Kit - 10W40 Ecstar Oil - 2011 to 2016. Complete OEM Service Kit Includes Oil, Gear Lube, and Service Kit 17400-91830 Designed for Suzuki DF4 and DF6 Outboards. The Suzuki DF4 DF6 Service Kit provides everything required to perform routine maintenance on your 2011-2016 Suzuki DF4 and DF6 four-stroke outboards. Each kit comes with 1 quart of Suzuki Ecstar 10W40 marine oil, 1 quart of Suzuki gear lube, and the genuine 17400-91830 OEM service kit, ensuring your outboard receiv