Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Sierra products are engineered to meet todays high horsepower engine demands and stand up in the harsh marine environment. All Sierra products meet or exceed the original equipment part it replaces. Sierra supplies many OEM engine manufacturers and boat builders hundreds of quality parts every day
This synthetic blend oil has been a lifesaver for my Mercury outboard. Every weekend I head out fishing, and it keeps my engine functioning well without any hiccups. Plus, the 4-liter size is just right for my needs!
C
Carlos Ramirez
Great for my Mercury engine!
I switched to this synthetic blend oil for my outboard motor, and the difference is clear. My Mercury engine runs much smoother, and I feel like it’s more efficient with fuel. Definitely worth the investment!
T
Tommy Nguyen
Good oil but pricey
I found this synthetic blend to work really well in my Mercury outboard. It keeps the engine clean and running without issues. My only complaint is the price—it feels a bit steep for a 4-liter bottle. Not sure if I'll repurchase at this price.
F
Fatima Hassan
Didn’t meet my expectations
I was hoping for better performance from this oil. My Mercury engine didn’t seem to run as well as it did with the previous oil I used. It's possible I just had high hopes, but I won't be buying it again. Disappointed.
L
Linda Cheng
Solid performance but slow shipping
The oil itself is great for keeping my outboard engine running smoothly. However, I had to wait longer than expected for delivery. It arrived a few days late, which was frustrating. But the oil works well once I finally got it!
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FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
