Description
Sierra Gasoline Inboard Sterndrive Engine Oil and are blended to the same high standards as the OEM oils and meet the same FC-W and TC-W3 certification standards. Sierra offers specific oils for your brand of engine, not a “one oil fits all” like some companies.
Available Gasoline Inboard Sterndrive Engine Oils
- Sierra 18-9400: 25W-40 Premium Blend Oil
- NMMA FC-W API SL Certification
- Meets or exceeds quality performance API, SJ, CF-4, CH-4
- Will not void your engine manufacturer’s warranty
- Sierra 18-9440: 25W-40 Synthetic Blend Oil
- NMMA FC-W API SL Certification
- Formulated for inboard and sterndrive engines
- Sierra 18-9410 SAE 30 Full Synthetic Oil
- API SL/CF Certification
- Formulated for inboard and sterndrive engines
- Sierra 18-9690: Full Synthetic 10W-30 Oil
- NMMA FC-W API SL Certification
- Formulated specifically for 4 cycle outboard and sterndrive technology
- Exceeds the FC-W requirements for marine engine oils
- Sierra 18-9552: Synthetic Blend 25W-50 Oil
- NMMA FC-W API SL Certification
- Meets the FC-W requirements for 4-cycle water cooled engines
- Replaces Mercury 92-858084K01 for Mercury Verado
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