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Sea Foam

Sea Foam High Mileage Motor Treatment Gas & Oil Additive, HM16, 16 oz, Pack of 1

  • Based on 2,345 reviews
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Availability: In Stock.
Fulfilled by Home-N-Autos
Arrives Wednesday, Aug 12
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Size: Pack of 1


Color: 16 ounces


Features

  • Sea Foam High Mileage works to keep higher mileage cars and trucks on the road longer.
  • Add to fuel to clean fuel injectors and carburetor jets. Add to crankcase oil to help clean and prevent the common causes of oil burning.
  • Lubricate critical upper engine areas.
  • Use regularly to reduce long-term engine wear and prevent rough engine performance.
  • Safe for all gasoline fuels and all types of motor oil.

Description

HIGH MILEAGE is specially formulated to help keep higher mileage gasoline cars and trucks on the road longer. High Mileage works in fuel to clean fuel passageways and lubricate upper engine areas. When added to oil, High Mileage cleans away harmful oil residues that can restrict flow. Just pour it in!

Manufacturer: ‎Sea Foam


Brand: ‎Sea Foam


Model: ‎Sea Foam High Mileage Motor Treatment HM16, 16 oz


Item Weight: ‎1 pounds


Product Dimensions: ‎7.75 x 2.63 x 2.63 inches


Item model number: ‎HM16


Manufacturer Part Number: ‎HM16


Special Features: ‎Non Abrasive


Date First Available: June 25, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Truck runs smoother
Size: Pack of 1 Color: 16 ounces
My truck runs much smoother with this in! I put it in every second full tank!
Reviewed in the United States on June 4, 2026 by Tommy
    • Proven Product
Size: Pack of 4 Color: 16 ounces
Great for older high mileage engines.
Reviewed in the United States on March 15, 2026 by Roy Dunn
    • A Must Have
Size: Pack of 1 Color: 16 ounces
This is by far the best product to keep your engine in shape and lasting a long time.
Reviewed in the United States on May 21, 2026 by Ms Fix It
    • As expected
Size: Pack of 4 Color: 16 ounces
Seafoam is seafoam. Cleans out my truck and stores well. Always easy to use and less expensive than replacing the catalytic converter haha. Functions well, doesn’t leak that I can tell and looks good.
Reviewed in the United States on April 28, 2026 by J.A. Peter, Author
    • Best I have found
Size: Pack of 4 Color: 16 ounces
I have been using this product for years.It has never disappointed and has always given me better gas mileage than e.P.A estimates
Reviewed in the United States on December 9, 2025 by Ralph Reed
    • Added to the oil and it pulled out a lot of carbon on a used truck Added to the oil and it pulled out a lot of carbon on a used truck
Size: Pack of 1 Color: 16 ounces
Review Image by Animequeen
Review Image by Animequeen
Review Image by Animequeen
I utilized this additive in my engine oil 200 miles before my scheduled oil change. This is on a Toyota tundra with a 5.7 L V8. I added the correct amount to the engine oil and drove 200 highway miles and then scheduled my oil change with a proper supplies. When I pulled out the Oil filter and took a closer look I saw an awful lot of black specs. It may be hard to tell in the pictures that I have attached but upon closer expections, you will see little black dots. When I would grab those and rub them between my fingers they would smear , like carbon deposits that had been removed. There were no metallic flakes or hard bits that I felt. After using this product, I noticed that the vehicle idles smoother, accelerates and runs smoother, and I do believe that it helped clean out some carbon buildup on my high mileage truck. I’ve been a believer of seafoam products in the gas and I am now a believer of seafoam products in the oil. If you follow the manufacturers directions, I would assume that you would be happy with the results as well. ... show more
Reviewed in the United States on October 19, 2023 Reviewed in the United States on October 19, 2023 by Animequeen
    • 340,000 Miles and Counting
Size: Pack of 1 Color: 16 ounces
Started using Seafoam about a year ago when my 2016 Toyota Camry was burning oil. I was using about a quart of oil every 1200 miles. I started putting 5 oz in the crankcase and the remainder of the bottle in the gas tank 200 miles before every 5000 mile oil change. After two treatments, the oil consumption rate is about a quart every 6000 plus miles. Reduced engine noise and improved performance. The Camry is going on 340,000 miles with all original parts. It works for me. ... show more
Reviewed in the United States on May 14, 2025 by JB4779
    • Good stuff
Size: Pack of 1 Color: 16 ounces
I use this on all my vehicles because it works. I also put a little in the gas for my 2-stroke tools, and they keep on running. My truck has 235,000 miles on it and runs like a champ.
Reviewed in the United States on August 15, 2025 by uj

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