HOW TO USE SEA FOAM
MOTOR TREATMENT IN OIL
BENEFITS
DIRECTIONS
treatment recommendations
SUMMARY
Sea Foam Motor Treatment can be used in every type of gasoline or diesel engine. When added to an engine’s oil crankcase, Sea Foam Motor Treatment works to clean and liquefy heavier oil deposits, so the residues will drain away when the oil is changed. Sea Foam cleans internal engine parts, prevents sludge and other harmful oil formations.

HOW TO USE SEA FOAM
mOTOR TREATMENT IN oil
RELATED QUESTIONS
Can I add Sea Foam to my 2016 Hyundai Sonata?
Yes, you can use Sea Foam Motor Treatment in your vehicle. It’s compatible with that model. Just follow the instructions on the can.
Here’s a little more info on how to use it:
- Sea Foam Motor Treatment in fuel. I like to wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits. Add it to fuel like this every 3,000 miles or once a year.
- Sea Foam Motor Treatment in oil. Add 1 ounce of Sea Foam per quart of oil in the crankcase. We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. To help progressively clean up your oil crankcase, add it before every oil change.
You could also try High Mileage Motor Treatment. It’s made specifically for stubborn residues and deposits in higher-mileage vehicles. It’s a great cleaner!
Can Sea Foam be used in a 2018 Ford 6.7 diesel engine operating with a DEF system?
Can I use Sea Foam on every oil change, specifically for shorter intervals such at 1500/2000 mile oil changes?
Thanks for the question, Gene. Yes, you can use Sea Foam on every oil change and it’s what we recommend as best practice. Doing that is a great way to help progressively clean away oil deposits and keep everything clean. Add 1 ounce of Sea Foam per quart of oil (and don’t exceed that ratio).
Is the amount of Sea Foam Motor Treatment before an oil change on a 6.0 Powerstroke still 1 oz per quart?
How how much Sea Foam do you put in a F250 2018 diesel?
Thanks for the question, Michael.
Here’s what I’d do:
- Sea Foam Motor Treatment in fuel. I like to wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits. Add it to fuel like this every 3,000 miles or once a year.
- Sea Foam Motor Treatment in oil. Add 1 ounce of Sea Foam per quart of oil in the crankcase. We recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. To help progressively clean up your oil crankcase, add it before every oil change.

Jim D.TECH
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