Thanks for the question! No, you do not have to drain any oil. There’s plenty of capacity for a few ounces of Sea Foam without draining any oil. As long as it’s not overfilled to begin with, you can go ahead and add it.

Thanks for the question, Juan. Yes, you can use Sea Foam Motor Treatment in a Subaru Sambar. You can use it in any gas or diesel vehicle in both the fuel and the oil.

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 a strong cleaner made specifically for stubborn residues and deposits in higher-mileage vehicles.

Thanks for the question, Eddie.  Yes, you can add the Sea Foam directly to the oil. Add 1 oz 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. It also lets you drain away all the reliquefied crud (residues and deposits) when you change your oil.

Hope that helps and let me know if you have any questions!

Thanks for the question! Yes, it is okay (it won’t hurt anything) to add Sea Foam to your oil 3 days after you’ve changed it. It will clean and help lubricate for the life of the oil. That said, we recommend adding it 100-300 miles before your next oil change.

Sea Foam reliquefies oil residues and deposits so they can be drained away with the old oil. It’s a very good cleaner. Adding it 100-300 miles before your next oil change gives the Sea Foam enough time to circulate and clean. It also lets you drain away all the reliquefied crud (residues and deposits) when you change your oil.