Thanks for the question, Terry!

Yes, you can use Sea Foam Motor Treatment in your Jeep. It’s compatible with any gas or diesel engine. 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.

Hope that helps and let me know if there’s anything else!

Hi Rhonda,

Thanks for the question!

Yes, you can absolutely use Sea Foam Motor Treatment in your 2005 Chevy Impala. It’s safe and effective for that vehicle. Just follow the directions on the can.

Here’s what I’d do to get the most cleaning power:

• In the fuel: Wait until the tank is low (about 1/4 tank or less), add the full 16 oz can, and then drive at least 10–20 miles (or until nearly empty) before refueling. The higher concentration works much better and faster to clean fuel residues and deposits.
• In the oil: Add 1 oz of Sea Foam per quart of oil 100–300 miles before your next oil change. This helps clean oil residues and deposits so they can be drained away with the old oil.

Sea Foam is a great preventative maintenance product and can also help if you’re experiencing issues related to fuel gum and varnish.

Thanks for the question, Lucy!

It depends if you’re asking about adding Sea Foam to fuel or adding Sea Foam to oil.

In fuel: No, adding a high volume of Sea Foam won’t harm your engine. Sea Foam is made with 100% petroleum based cleaning and lubricating ingredients. In fact, a high concentration of Sea Foam in your gas tank will do a better and faster job cleaning. You can use it up to a 1:2 ratio of Sea Foam to fuel (though that’s more than you need). Here’s what I’d do: 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.

In oil: do not exceed 1 ounce of Sea Foam per quart of oil in the crankcase. If you’ve added more than that, go ahead and change the oil.

Thanks for the question, Scott!

You can use Sea Foam Motor Treatment in the oil of your 2017 Nissan Titan XD 5.0L Cummins diesel.

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 the reliquefied oil residues and deposits to be drained away with the old oil.

You don’t need to wait until after an oil change. It’s best to add it before your next scheduled oil change, not immediately after one. After you add it, wait to change your oil until you’ve driven 100-300 miles.

I’d recommend using it once each oil change interval. Do not exceed one treatment per oil interval. And be sure not to exceed 1 ounce per quart of oil.

Thanks for the question!

Yes, Sea Foam products are safe to use in an ’87 Chevy Square Body.

If you’re asking about Sea Foam Motor Treatment, you can use it in both the fuel tank and the oil. It will work to clean fuel residues, gum, and varnish in the fuel system, and clean oil residues and deposits in the crankcase.

If you’re asking about Sea Foam Spray, it’s also safe to use on that engine for upper engine cleaning. Just follow the directions on the can.

Those older carbureted Chevy engines are actually great candidates for Sea Foam because fuel gum and varnish is a very common cause of rough running, hard starting, and poor performance as they age.