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Item #:
7721202
Mercury 25W-40 4-Stroke Synthetic Blend Marine Engine Oil, 1 Quart - 8M0078629
Item #:
7721202
AUD 55
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Imported from USA store
QTY:
Order now and get it around Thursday, August 27
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This synthetic blend of premium grade base stocks contains specifically designed additives for optimum marine performance that regular automotive oils do not require. Superior moisture and rust protection, improved performance and protection against wear for trouble-free operation.
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What Stands Out
Synthetic Blend
Combines the advantages of synthetic and conventional oils, providing superior protection and performance for marine engines, ensuring long-lasting durability and efficiency.
High Versatility
Designed for a wide range of marine engines, this oil meets the demands of various boating conditions, making it a reliable choice for all types of watercraft.
Corrosion Protection
Specially formulated to resist corrosion and oxidation, this oil helps extend engine life and ensures optimal performance, even in harsh marine environments.
Product Details
- Genuine Mercury Marine 92-8M0078629 Synthetic Blend 4-Stroke (25W-40) Engine Oil
- Formulated with premium base stocks and specific marine performance additives
- Provides superior moisture and rust protection, and wear prevention for trouble-free operation
- Suitable for 4-cycle outboard, sterndrive, and inboard engines, exceeding OEM marine engine oil recommendations
- Exceeds automotive oils in marine applications, offering outstanding wear, corrosion protection, reliability, and longevity
- Meets warranty protection standards for Mercury MerCruiser engines and all 4-cycle sterndrive and inboard engine requirements
| Container Type | Bottle |
| Compatible with Vehicle Type | Marine Engines |
| Flash Point | 400 Degrees Fahrenheit |
| Automotive Fit Type | Vehicle Specific Fit |
| Liquid Volume | 1 Liters |
| Brand Name | MERCURY |
| Manufacturer Part Number | 8M0078629 |
| UPC | 745061915688 |
| Manufacturer | Mercury Marine |
| Model Number | 8M0078629 |
| Item Weight | 1 Pounds (450 grams) |
| Included Components | Engine Oil |
| Unit Count | 32 Fluid Ounces |
| Brand | MERCURY |
| Package Information | Bottle |
| Vehicle Service Type | Marine Engines |
Who Should Buy?
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Marine Enthusiasts
Ideal for boat owners who require reliable engine oil for four-stroke engines in various marine conditions.
-
Seasonal Users
Perfect for users who operate their vessels infrequently, providing enhanced protection during long periods of non-use.
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Preventative Maintenance
Beneficial for those performing regular engine maintenance who want to ensure optimal performance and longevity.
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High-Performance Engines
Not suitable for high-performance engines that require specialized oils with specific additives for maximum efficiency.
Product Description
Mercury 25W-40 4-Stroke Synthetic Blend Marine Engine Oil, 1 Quart - 8M0078629
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil used for?
Answer: OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil is specifically designed for 4-stroke marine engines, providing optimal lubrication and protection. It ensures smooth engine performance, enhances fuel efficiency, and safeguards against wear and corrosion. Ideal for recreational boating, this oil caters to both weekend sailors and avid fishermen, ensuring your engine runs smoothly in various water conditions. -
Question:
What are the benefits of using synthetic blend engine oil?
Answer: Synthetic blend engine oil combines the best properties of synthetic and conventional oils, offering improved performance and protection. This blend results in better temperature stability, enhanced lubrication during cold starts, and reduced oxidation. For boaters in varying climates, the synthetic blend helps maintain engine integrity, making it an excellent choice for both casual and competitive boating. -
Question:
How often should I change my engine oil?
Answer: Regular oil changes are crucial for optimal engine performance. While it typically depends on the frequency of use, a general guideline is to change the oil every 100 hours of operation or at least once per season. For those who use their boats extensively or in harsh conditions, more frequent changes may be necessary to maintain engine health and efficiency. -
Question:
Is this engine oil suitable for use in all marine 4-stroke engines?
Answer: OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil is specially formulated for Mercury and Mariner 4-stroke engines. While it may be suitable for some other marine 4-stroke engines, it is always best to consult the owner's manual for compatibility. This can help ensure the engine's performance and longevity. -
Question:
Can I mix this oil with other engine oils?
Answer: Mixing different engine oils is generally not recommended, as it can compromise performance and lead to engine issues. The OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil is crafted to provide specific benefits, and using it exclusively helps maintain consistency in lubrication and protection. Therefore, it's wise to drain any other oil before switching to this product. -
Question:
What viscosity does this engine oil have?
Answer: This engine oil has a viscosity rating of 25W-40, indicating its performance in both low and high temperatures. The 'W' stands for winter, meaning it performs adequately in cold conditions, while the '40' showcases its ability to maintain lubricant properties in hotter environments. This dual capability makes it ideal for varied marine conditions, ensuring reliable operation year-round. -
Question:
What does 'FC-W' mean on the label?
Answer: 'FC-W' is a classification that denotes oil suitable for marine applications, particularly designed for 4-stroke outboard and inboard engines. This designation ensures that the oil meets specific performance criteria set by the NMMA (National Marine Manufacturers Association), helping safeguard engines from wear, rust, and other environmental challenges, making it a trusted choice for marine enthusiasts. -
Question:
How does using this oil affect engine performance?
Answer: Using OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil significantly enhances engine performance by ensuring optimal lubrication and reducing wear. Improved fuel efficiency is another benefit attributed to this specialized oil, allowing boaters to enjoy longer trips without frequent refueling. Overall, it helps ensure that the engine runs smoothly and efficiently during both leisure and competition. -
Question:
Does this engine oil help in reducing emissions?
Answer: Yes, using OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil contributes to lower emissions. Its superior formulation reduces harmful exhaust emissions compared to conventional oils, aligning with environmental standards. This feature not only benefits the environment but also supports sustainable boating practices, making it a responsible choice for environmentally-conscious boaters. -
Question:
Where can I buy OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil One Quart?
Answer: You can purchase OEM Mercury 4-Stroke FC-W SAE 25W-40 Synthetic Blend Engine Oil One Quart through Ubuy in Australia. Ubuy offers a wide selection of quality marine engine oils, making it easy to find the right product for your needs.
MERCURY Motor Oils 8M0078629 Editorial Review
The MERCURY Genuine 1 Quart 4-Cycle Oil, Syn, Mpp - 8M0078629 has received positive reviews from customers. Many have used this product for years and have found it to outperform other brands. Customers have noted that the oil is long-lasting and keeps the motor clean. While the price of the oil is known to be high, customers have found the fast shipping to make up for the added cost. Overall, this product is a great option for those in need of quality motor oil.
Customer Reviews & Ratings
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Pros
- Outperforms other brands
- Long-lasting and keeps the motor clean
- Fast shipping
Cons
- High price
Platform Trust & Buyer Confidence
CJ
Chris
Verified buyer
“Promt delivery. Seems like a good product.”
22 July 2026 · via Trustpilot
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Scott
Verified buyer
“It was the best service ever received by any company from my online shopping experience in the last 10yrs”
11 July 2026 · via Trustpilot
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Terri
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“so easy to order delivery was way earlier than i expected”
3 July 2026 · via Trustpilot
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Gavin
Verified buyer
“Very impressed with the speed at which I received my package from the United States to Australia. Highly recommended.”
21-Jul-26 · via Trustpilot
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Jeannie
Verified buyer
“Very efficient service. Hassle-free. Excellent product. Have ordered several times.”
17-Jul-26 · via Trustpilot
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AUD 55
Order now and get it around Thursday, August 27
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Features & Benefits
- Superior moisture and rust protection
- Provides outstanding wear and corrosion protection which help extend engine life
- Eliminates thermal breakdown under extreme rpm, temperatures and loads
- Exceeds oil requirements and FC-W Catalyst Compatible qualifications for all marine engine manufacturers
- Approved for use in any marine engine equipped with or without a catalytic converter
- Use of this oil will not void manufacturers warranties
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