Do not exceed 1 oz of Sea Foam per quart of oil. If you have more than 2-3 oz total over the recommended amount, I’d change the oil just to be safe. (example: if you added 9 oz to a 5 quart oil system).
Some people will drain just enough to bring it back to the recommended ratio. (example: if you have a 5 quart oil system and you accidentally added 10 oz of Sea Foam (twice the recommended amount), drain half the oil (2.5 quarts), and then fill it back up with 2.5 quarts of fresh oil.
Steve Alcorn
1 month ago
But why? I have a tundra with 250,000 miles that was heavily neglected due to a passing soul and it went 18,000 miles on the last oil change. I have low oil pressure so what harm can I actually do?
Adding significantly more than 1 oz of Sea Foam per quart of oil will alter the oil’s viscosity beyond what is recommended by vehicle manufacturers. We do not recommend doing that. That can cause some serious problems in an engine. For more info on oil viscosity and Sea Foam, check out this article: https://seafoamworks.com/shop-talk/understanding-oil-viscosity/.
Hope that makes sense and let us know if you have any other questions!
We use necessary cookies to make our site work. We'd also like to set analytics cookies that help us make improvements by measuring how you use the site. These will be set only if you accept.
Based on your browser's "Do Not Track" or "Global Privacy Control" settings we have automatically rejected analytics cookies for you.
Necessary Cookies
Necessary cookies enable core functionality. The website cannot function properly without these cookies, and can only be disabled by changing your browser preferences.
Analytics Cookies
We use Google Analytics cookies to help us improve our website by collecting and reporting information on how you use it. The cookies collect information in a way that does not directly identify anyone.
Good question, Silvino.
Do not exceed 1 oz of Sea Foam per quart of oil. If you have more than 2-3 oz total over the recommended amount, I’d change the oil just to be safe. (example: if you added 9 oz to a 5 quart oil system).
Some people will drain just enough to bring it back to the recommended ratio. (example: if you have a 5 quart oil system and you accidentally added 10 oz of Sea Foam (twice the recommended amount), drain half the oil (2.5 quarts), and then fill it back up with 2.5 quarts of fresh oil.
But why? I have a tundra with 250,000 miles that was heavily neglected due to a passing soul and it went 18,000 miles on the last oil change. I have low oil pressure so what harm can I actually do?
Hi Steve,
Adding significantly more than 1 oz of Sea Foam per quart of oil will alter the oil’s viscosity beyond what is recommended by vehicle manufacturers. We do not recommend doing that. That can cause some serious problems in an engine. For more info on oil viscosity and Sea Foam, check out this article: https://seafoamworks.com/shop-talk/understanding-oil-viscosity/.
Hope that makes sense and let us know if you have any other questions!