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 offers a full line of direct replacement weight oils that are specifically blended to protect your engine in the harsh marine environment and the extreme load conditions that your engine is subjected to every time you push down on the throttle.
I had high hopes for the Sierra engine oil, but after a couple of weeks, my engine was making odd noises. I suspect it just didn’t maintain the proper viscosity. I won’t be buying this again; it’s too risky for my vehicle!
E
Emily Chen
Decent, but had delivery issues
This synthetic blend oil does a good job in my car, and I've noticed better performance since switching to it. However, it took longer to arrive than expected, and the box was a bit damaged when it got here. Still, the oil itself is solid.
C
Carlos Martinez
Great oil for my old truck!
I've been using the Sierra 18-9440CAT engine oil for my 2005 truck, and it works like a charm. The 25W viscosity is perfect for my aging engine, and I feel like it runs smoother than before. Plus, the 5-quart size is super convenient for oil changes!
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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.
