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Sierra 25W-40 Synthetic Blend Engine Oil

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List Price: $10.30
Starting At: $7.99
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Sierra 25W-40 Synthetic Blend Engine Oil

Sierra 4-Stroke 25W-40 Engine Oil is blended with premium grade synthetic and mineral based stock combined with superior designed additives formulated for the stress endured by sterndrive and inboard engines. This oil was developed for the marine environment and will outperform standard 4-cycle automotive engine oils. Sierra's 25W-40 oil offers excellent detergency, anti-oxidants, anti-wear, and corrosion protection. This oil provides numerous benefits for your boat engine including reduced wear of internal components, cleaner pistons, and it helps prevent ring sticking. Sierra 25W-40 oil also provides excellent low temperature operating properties.


  • 4-Cycle oil
  • Superior corrosion protection
  • Advanced lubrication for reduction of wear to internal engine components
  • Outstanding friction reduction and wear protection
  • Removes thermal breakdown under high RPM's, extreme temperatures and loads
  • Extensively tested for outstanding performance
  • Exceeds stringent Sierra and OEM warranty requirements
  • NMMA FC-W Certified/API-SL

Interchangeable with:

  • Mallory
    • 9-82392
  • Mercury Marine
    • 92-883725K01

pdficon.png Click to Download Sierra Synthetic Oil MSDS

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Google Product Type:
Oil Use:
Engine Oil
Oil Type:
Synthetic Blend


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