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

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.

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

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.