Oils, Fluids and Sealer› Oils, Fluids and Additives

SIERRAMARINE

15W-40 MULTI-VEHICLE (5 QT)

$46.55

SKU: S08C 18-9554-4

In Stock
In Stock
Ships by Sep 7
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item

Overview

The Sierra Marine 15W-40 Multi-Vehicle Oil is a conventional, 5-quart engine oil specifically formulated for the heavy-duty inboard marine market, including cruisers and towboats. It meets API Service classifications up to CK-4 and SM. This oil is intended for Inboard Ski applications. It is not for use in gasoline engines equipped with catalytic converters and replaces several other oil brands and part numbers.
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15W-40 MULTI-VEHICLE (5 QT)

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSIERRAMARINE
Part NumberS08C 18-9554-4

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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