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.

Thanks for the question!

Yes, you can add Sea Foam Motor Treatment to the oil in your 1998 Honda Civic DX. 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.

Sea Foam in the oil works to clean oil residues and deposits that can build up over time and restrict oil flow.

Just be sure not to exceed 1 ounce per quart of oil.

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

Thanks for the question, Carlos! Yes, you can use Sea Foam in a wet clutch oil system. You are correct – use 1 oz per quart of oil and add it 100-300 miles before your next oil change. Sea Foam in the oil can help clean oil residues and deposits.

Thanks for the question, Rodney. The biggest thing that Sea Foam will do for your Malibu is clean residues and deposits (which form over time in any engine) from your fuel and oil systems. Those residues and deposits often cause common engine problems like loss of fuel efficiency, loss of power, rough idle, and oil burning. The most important thing Sea Foam does is liquefy and clean away those residues so the engine can continue to run its best, or overcome problems caused by a dirty fuel or oil system. It’s a cost-effective and easy form of preventative maintenance.

Here’s what I’d do to get the most cleaning power when adding Sea Foam to the gas tank:

• Wait until the tank is low (about 1/4 tank or less)
• Add a full 16 oz can of Sea Foam
• Drive at least 10-20 miles (or until nearly empty) before refueling

The high concentration works much better and faster than adding it to a full tank.

You can also add Sea Foam to the oil. Add 1 ounce per quart of oil in the crankcase 100-300 miles before your next oil change. Sea Foam will reliquefy heavier oil residues and deposits so they can drain away with the old oil.

Thanks for the question! Add 1 oz of Sea Foam per quart of oil in the crankcase. Best practice is to run it at least 100 miles before you change your oil (just ride normally until you reach 100 miles – you don’t need to ride it 100 miles right away).