10W-30 FC-W 4-Stroke Catalyst Oil Gallon - (MW)

Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil

Sierra 10W-30 4 Stroke Catalyst Engine oil is designed for modern 4-stroke recreational engines with or without emission catalyst systems. Approved for all 4 stroke applications including outboard, inboard, and sterndrive. Exceeds all requirements including FC-W and FC-W Cat compatible. The premium blend provides superior protection against corrosion in harsh marine environments. Anti-wear technology  prevents phosphorus depletion to extend the mission catyalyst life while still providing outstanding protection.

Features:

• ZDDP Anti-wear additive
• Deposit control
• Exceeds 4 Stroke FC-W and FC-W Cat compatible requirements
• Approved for 4 Stroke outboard, inboard, and sterndrive applications
• Replaces: Mercury. Johnson/Evinrude, Nissan/Tohatsu, Suzuki, Yamaha, & Honda

How much oil does my engine need?

It varies model to model, check out our Engine Oil Capacity Guide for more information and capacity charts!

Sizing:

• Quart 18-9420CAT-1
• Gallon 18-9420CAT-3

Interchange

• Mercury Marine
• 92-8M0078625
• 92-8M0078626

Frequently Asked Questions

What is Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil used for?

Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil is designed for modern 4-stroke recreational engines with or without emission catalyst systems. It is approved for 4-stroke outboard, inboard, and sterndrive applications and provides corrosion protection in harsh marine environments.

Is Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil compatible with catalyst systems?

Yes. This oil is designed for engines with or without emission catalyst systems and is FC-W Cat compatible. Its anti-wear technology helps prevent phosphorus depletion while providing protection for the engine and emission catalyst system.

Which 4-stroke marine applications can use Sierra 10W-30 Catalyst Marine Oil?

Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil is approved for 4-stroke outboard, inboard, and sterndrive applications. The product description also states that it replaces specified oils from Mercury, Johnson/Evinrude, Nissan/Tohatsu, Suzuki, Yamaha, and Honda.

What features does Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil provide?

This marine oil contains a ZDDP anti-wear additive and provides deposit control. It exceeds 4-stroke FC-W requirements and is FC-W Cat compatible, while its premium blend provides corrosion protection in harsh marine environments.

What sizes and part numbers are available for Sierra 10W-30 Catalyst Marine Oil?

Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil is available in a quart size, part number 18-9420CAT-1, and a gallon size, part number 18-9420CAT-3.

What Mercury Marine part numbers does Sierra 10W-30 Catalyst Marine Oil replace?

The product description lists Mercury Marine part numbers 92-8M0078625 and 92-8M0078626 as interchangeable part numbers for Sierra 10W-30 4-Stroke Conventional Catalyst Marine Oil.

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