Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

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Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

SKU: 18-9420CAT-2

$10.99

Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

Industry leading wear protection and deposit control.
Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

Prevents phosphorous depletion and extends the emission catalyst life.
Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

Provides superior corrosion protection under extreme conditions.
Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

Exceeds all 4-stroke requirements including FC-W and FC-W cat compatible.
Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

Capitalizing on "ZDDP" anti-wear additive technology.
116 In Stock - Ships in 1-3 days

Shipping & Returns

Shipping

Most in-stock products ship within 1-3 business days. Your available shipping method and final shipping cost will be shown at checkout. Qualifying standard-shipping orders of $150 or more ship free, while larger items may require oversized or freight delivery.

For more information, view our Shipping Policy.

Returns

Changed your mind? Most products can be returned within 30 days of delivery as long as they are unused, uninstalled, and in their original condition.

Contact us to start a return, and we’ll guide you through the next steps.

For complete details, view our Returns & Refunds Policy.

Warranty

Available warranty coverage is provided by the manufacturer and varies by brand and product. Modridge assists customers with eligible warranty claims and helps coordinate the review process with the manufacturer.

Contact us before returning, repairing, modifying, or discarding a product that may be defective. Order information, photographs, installation details, and diagnostic information may be required.

For coverage details and claim instructions, review our Warranty Policy.

Prop 65 Warning

WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov
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Sierra Marine Oil, Marine Series, SAE 10W-30, Premium Blend 4-Stroke Catalyst Engine Oil - 18-9420CAT-2

$10.99

$10.99

SAE 10W-30

Viscosity Grade

4 Stroke

Engine Type

Conventional

Design

Product Description

Sierra Marine Oil (18-9420CAT-2).


Additional Details

  • Meets requirements of modern 4-stroke recreational engines with or without emission catalyst systems.
  • Approved for all 4-stroke applications including outboard, sterndrive and inboard.
  • NMMA FC-W certified.
  • Premium blend 4-stroke catalyst engine oil.
  • 1 quart bottle.


Returns

This item is not eligible for standard returns. Damaged, incorrect or defective items are handled under our Return Policy.

Specifications

Use
Marine Use
Engine Type
4 Stroke
Viscosity Grade
SAE 10W-30
Type
Conventional
Unit Size
1 Quart
Unit Quantity
Single
Universality
Semi-Universal
Unit Type
Bottle

Installation & Documents


Oil Quick Refernce Guide update_3_2026.pdf



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