Product Description
Ultra1Plus™ SAE 25W-40 Synthetic Blend 4-Stroke Marine Engine Oil
Engineered for modern 4-stroke marine engines, Ultra1Plus™ SAE 25W-40 Synthetic Blend Marine Engine Oil delivers advanced wear protection, superior corrosion resistance, and dependable high-load performance in both saltwater and freshwater environments.
Formulated with a premium blend of synthetic and high-quality mineral base oils and powered by Ultra1Plus™ Marine Protection Technology, this high-performance marine lubricant is specifically designed to withstand the harsh operating conditions unique to marine engines, including high humidity, extended idling, heavy loads, fuel dilution, and continuous high-RPM operation.
Its advanced marine additive system provides outstanding protection against wear, oxidation, rust, corrosion, sludge formation, and thermal breakdown while maintaining excellent engine cleanliness and stable viscosity under extreme temperatures and demanding marine conditions.
Designed for recreational and commercial marine applications, U1P-Aqua SAE 25W-40 helps maximize engine reliability, smooth operation, and long engine life for outboard, inboard, sterndrive, and marine power systems.
Why Choose Ultra1Plus™ 25W-40 Marine Oil
- Advanced Marine Wear Protection: Helps protect critical engine components against wear, friction, and heavy-load operation.
- Superior Corrosion & Rust Defense: Provides exceptional protection against rust, corrosion, and moisture exposure in saltwater and freshwater environments.
- Protection Against Fuel Dilution: Helps maintain viscosity stability and engine protection even under fuel dilution conditions common in marine engines.
- Outstanding High-Temperature Stability: Maintains strong lubricant film protection during high-speed and high-load marine operation.
- Excellent Cold & Hot Temperature Performance: Provides dependable lubrication and startup protection across a wide temperature range.
- Enhanced Engine Cleanliness: Helps prevent sludge, varnish, and harmful deposits for cleaner and more efficient engine operation.
- Reduced Internal Friction: Helps improve engine efficiency and power delivery while supporting longer engine life.
- Heavy-Duty Marine Durability: Designed for both recreational boating and demanding commercial marine applications.
Applications
Recommended for:
- 4-stroke marine engines
- Outboard and inboard engines
- Sterndrive marine applications
- Saltwater and freshwater operation
- Recreational and commercial marine equipment
- High-load and high-speed marine environments
Specifications & Compatibility
- Suitable for many 4-stroke marine engine applications requiring SAE 25W-40 viscosity
- Designed for marine engines operating under severe temperature and load conditions
Manufacture ID: UL419
Ultra1Plus™ can export products worldwide. Products available for larger purchases, truckloads and pallets, please CONTACT US
WHAT DOES IT MEAN WHEN A PRODUCT IS "UNAVAILABLE"?
Safety Data Sheets & Product Information:
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| WARNING: California Proposition 65 www.p65warnings.ca.gov | |
| Applications: Use in all brands of high-horsepower gasoline-fueled four-stroke inboards, outboards, Stern Drive/Inboard and personal watercraft that require any of the specifications listed below, including those made by Mercury and Mercruiser and FC-W Catalyst compatible. | |
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Aditional information
Reviews
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25-40 oil
Supposedly meets same specs as Mercury oil but at a reduced price. Order filled and shipped very quickly.
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25W-40 engine oil
good price on time delivery
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Perfect for Mercury 60hp 4 stroke
Exactly as stated and just right amount for motor
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Good quality
It does what I need at a good Price.
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Ultra1 Plus SAE 25W-40 Engine Oil Review
Fast shipping, good product quality. It will be perfect, if the sale price can come down a dollar or two.
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great seller, good product
good product, Thanks
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Awesome!!!
Excellent!!!
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Arrived on time in good shape.
Yup it's oil...



