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Inboard & Sterndrive Engine Oil

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Sierra 18-9400-2 OIL-25W40 FCW I/O-I/B QT@12CS

Grade25W40
SizeQuart
Case12
$8.49 $5.79

Sierra 18-9400-30 OIL-25W40 FCW I/O-O/B 30 GAL

Grade25W40
Size30 Gallon
Case1
$878.31 $658.21

Sierra 18-9400-4 OIL-25W40 FCW I/O-I/B 5QT@4/CS

Grade25W40
Size5 Quart
Case4
$39.89 $28.99

Sierra 18-9400-7 OIL-25W40 FCW I/O-O/B 55 GAL

Grade25W40
Size55 Gallon
Case1
$1,576.21 $1,142.75

Sierra 18-9400CAT-2 OIL 25W40 FCW CAT QT

Grade25W40
SizeQuart
Case12
$7.63 $5.21

Sierra 18-9400CAT-4 OIL 25W40 FCW CAT 5QT

Grade25W40
Size5 Quart
Case4
$33.49 $24.04

Sierra 18-9400CAT-7 OIL 25W40 FCW CAT 55GAL

Grade25W40
Size55 Gallon
$1,339.78 $971.39

Sierra 18-9410-2 FULL SYN ENGINE OIL QT @12

Grade30
SizeQuart
Case12
$10.99 $7.99

Sierra 18-9410-4 FULL SYN ENGINE OIL 5 QT @4

Grade30
Size5 Quarts
Case4
$47.99 $38.99

Sierra 18-9440-2 SYNTH BLEND MERCRUISER OIL QT

Grade25W40
SizeQuart
Case12
$9.99 $7.49

Sierra 18-9440-4 SYNTH MERCRUISER OIL 5 QT

Grade25W40
Size5 Quart
Case4
$45.49 $34.11

Sierra 18-9440-7 OIL 25W40 SEMI SYNTHETIC 55GAL

Grade25W40
Size55 Gallon
Case1
$1,754.43 $1,238.01

Sierra 18-9440CAT-2 OIL 25W40 FCW CAT SYN BLEND QT

Grade25W40
SizeQuart
Case12
$8.99 $6.69

Sierra 18-9440CAT-4 OIL 25W40 FCW CAT SYN BLND 5QT

Grade25W40
Size5 Quart
Case4
$40.99 $30.76

Sierra 18-9440CAT-7 OIL 25W40 FCW CAT SYN BLND 55G

Grade25W40
Size55 Gallon
$1,528.49 $1,146.18

4-CYCLE CATALYST STERN DRIVE ENGINE OIL 25W40 FC-W CATALYST COMPATIBLE (SIERRA)

Sierra NMMA FC-W Catalyst Compatible Oils have been specifically designed to meet the unique requirements of modern four-stroke recreational engines with or without emission catalyst systems. Since recreational engines are often used in extreme operational and environmental conditions, robust oil is required to provide adequate protection. Utilizing premium base stocks and industry leading additive technology, Sierra Catalyst Compatible Oils excel.
  • Industry leading wear protection and deposit control for engine longevity

  • Minimize internal engine corrosion

  • Enhanced detergent and dispersants properties suspend and prevent engine sludge formation

  • Reduced engine friction

  • High quality base stocks prevent thermal and oxidative breakdown

  • Highly shear stable viscosity stabilizers prevent excessive thinning

  • Advanced, highly thermally stable "ZDDP" anti-wear additive technology prevents phosphorus depletion and extended catalyst life
From $5.21

FULL SYNTHETIC 4-CYCLE INBOARD/STERNDRIVE MARINE ENGINE OIL (SIERRA)

A special blend of synthetic base oil and a balanced additive system that exceeds the FC-W requirements for marine engine oil.
Recommended for gasoline and diesel inboard and sterndrive engines
Superior engine protection during startups, operation and storage
Reduces friction and wear for extended engine life
Reduces oil consumption and improves fuel economy
Sold in case packs only.
From $7.99

PREMIUM 4-CYCLE ENGINE OIL (SIERRA)

Formulated to provided excellent lubrication and corrosion protection. Developed for the marine environment and outperforms automotive engine oils with excellent detergency, anti-oxidants, anti-wear, and corrosion protection. This results in reduced internal component wear and corrosion, cleaner pistons, and prevention of ring sticking. Excellent low temperature operating properties. Meets or exceeds quality performance API SJ, CF-4, CH-4 and is NMMA FC-W certified. Recommended for use in Mercruiser and OMC.
Sold in case packs only.
From $5.79

SYNTHETIC BLEND 4-CYCLE CATALYST INBOARD/STERNDRIVE ENGINE OIL 25W-40 (SIERRA)

A special blend specifically designed to meet the unique requirements of modern 4-stroke recreational engines with or without emission catalyst systems.
  • NMMA FC-W® Certified/API-SL.

  • Minimizes corrosion that is formed inside the engine.

  • Displays enhanced detergent and dispersants properties to suspend and prevent engine sludge formation.

  • Industry leading wear protection and deposit control.

  • Prevents excessive thinning under extreme performance operations.

  • Capitalizing on "ZDDP" anti-wear additive technology to prevent phosphorus depletion and extend the emission catalyst life.
From $6.69

SYNTHETIC BLEND 4-CYCLE INBOARD/STERNDRIVE ENGINE OIL (SIERRA)

This 4-cycle 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.
  • 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

  • Sold in case packs only
From $7.49