Suzuki ECSTAR is Suzuki's own line of marine lubricants, formulated for the tolerances, operating temperatures and load profiles of DF series 4-stroke outboards, and it is what Suzuki dealer service departments use. Suzuki's specification is SAE 10W-40, API SG through SM or NMMA FC-W; ECSTAR V7000 10W-40 meets it, and a marine FC-W oil carries corrosion inhibitors that automotive oil does not.
Boat Max Online stocks genuine Suzuki ECSTAR V7000 10W-40 by the quart and gallon, and ECSTAR SAE 90 hypoid gear oil for the lower unit. Change engine oil at the initial 20 hours or 1 month, then every 100 hours or 12 months; the filter at 20 hours, then every 200 hours.
Suzuki engine oil capacity by model
| Model | Oil change only | With filter change |
|---|---|---|
| DF2.5 | 0.38 L (0.4 US qt) | no filter |
| DF4A / DF5A / DF6A | 0.7 L (0.74 qt) | 0.7 L |
| DF8A / DF9.9A | 0.8 L (0.85 qt) | 0.9 L |
| DF9.9B / DF15A / DF20A | 1.0 L (1.1 qt) | 1.1 L |
| DF25A / DF30A | 1.5 L (1.6 qt) | 1.7 L |
| DF40A / DF50A / DF60A | 2.7 L (2.9 qt) | 2.9 L |
| DF70A / DF80A / DF90A / DF100B | 4.0 L (4.2 qt) | 4.3 L |
| DF100A / DF115A / DF140A, DF115B / DF140B, BG | 5.5 L (5.8 qt) | 5.7 L |
| DF150 / DF175, DF150A / DF175A / DF200A, AP | 8.0 L (8.5 qt) | 8.5 L |
| DF200 / DF225 / DF250 V6, DF250AP / DF300AP | 8.0 L (8.5 qt) | 8.2 L |
| DF300B / DF325A / DF350A | 8.0 L (8.5 qt) | 8.5 L |
Buying oil with the filter and gaskets already matched to your motor is easier: see Suzuki oil change kits.
Authorized Suzuki Marine dealer; every bottle is genuine Suzuki product through authorized distribution. Free shipping on orders over $149 to the lower 48 states.
Capacities from the Suzuki 4-Stroke Outboard Maintenance Manual, Oil Data (Feb 2025).