Thanks for the question! 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.

Good question! Yes, Sea Foam is safe and effective in a Cummins X15 diesel. Just follow the directions on the can. You can also check out our page on diesel maintenance basics that has a few recommendations for using Sea Foam in diesel engines.

https://seafoamworks.com/diesel-engine-maintenance-basics/

Thanks for the question!

Add one ounce of Sea Foam per quart of oil in the crankcase.

Also, check out the article on our site about oil burning and its common causes. That will help explain what Sea Foam can and can’t do for a vehicle that’s using oil.

https://seafoamworks.com/how-to-fix-oil-burning/

If the oil use is caused by varnish or buildup, Sea Foam can help. Sea Foam reliquefies oil residues and deposits so they can be drained away with the old oil. I’d recommend the High Mileage version. It’s a great cleaner.

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.

Thanks for the question, Chris! You can leave Sea Foam in your oil until your next regularly scheduled oil change. It’s safe to leave it in there for as long as you’d like.

That said, we recommend adding it 100-300 miles before an oil change. That gives it a chance to circulate and clean while allowing all the reliquefied residues to drain away with the old oil when you change it.

Thanks for the question!

You can add Sea Foam to the oil at any time.

That said, we recommend adding to about 100-300 miles before an oil change. That gives the Sea Foam time to circulate and clean, while allowing any reliquefied residues to be drained away soon when you change the oil.