Marine Engine Oils

Ultra1Plus™ marine engine oils are formulated to help protect gasoline marine engines operating in demanding water, moisture, load, and corrosion-prone environments.

Our marine oil portfolio includes full synthetic and synthetic blend options designed for 4-stroke marine engines, outboards, inboards, sterndrives, personal watercraft, recreational boats, marina service operations, and marine distribution channels.

Select Ultra1Plus™ marine engine oils are formulated for applications requiring NMMA FC-W performance where stated on the product label, product page, or technical documentation. Marine engines often operate under higher loads, extended run times, humid environments, and unique corrosion challenges compared with automotive engines, so choosing the correct marine oil matters.

Ultra1Plus™ marine oils are designed to support engine cleanliness, corrosion protection, wear protection, oxidation resistance, and reliable lubrication in marine operating conditions when used according to the engine manufacturer’s recommendation.

Customers should always confirm the correct viscosity grade, service category, NMMA requirement, and OEM recommendation before selecting a marine engine oil.

Many Ultra1Plus™ marine engine oils are available in retail and bulk formats, including bottles, cases, 5-gallon pails, 55-gallon drums, and 265-gallon totes where available by SKU.

Browse Ultra1Plus™ marine engine oils below, or contact our team for B2B pricing, bulk availability, marine service supply, distributor opportunities, and technical product support.

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