The bad is the carbon gunk and other mess cleaned from the cylinders clogged my catalytic converter and covered my oxygen sensor, leading me to purchase a cleaning fluid remedy for that. Otherwise highly recommended. I have a 2012 Ford Escape with 127K miles.

Sea Foam has cured all of the problems that I have had with my two cycle engines likely due to ethanol gas. Great stuff.

I use it in all my cars and my motorcycle, good stuff

I have a 2004 Yamaha FZ1. It has 4 large carburators. The gas can sit in the bowls all winter. In the Spring you can bet that gas turns to turpintine in there. I have a 5 gallon tank. All I have to do is put fresh fuel and a half of a bottle of Sea Foam in the tank. Usually it will clean up while the choke is on and the bike is warming up. 3 to 4 minutes. Then I am ready to ride my finely tuned machine. A Motorcycle shop charges about $1000 to remove, clean and replace the 4 carbs on this bike so10 bucks a can is beyond a bargin. Every bike shop and retailer tells you this or that product is the best. I have used mosy of them and they do not work and some actually cause additional problems. I have seen products that are very similar in packaging trying to look like Sea Foam too. That should be a clue about its effectiveness. I hope this company guards their formula just as secret as Coke guards their Coca-Cola recipe because they deserve it. lol. Yes just like nothing works like WD40, nothing works like Sea Foam. I use it in my snow thrower tank, pressure washer, lawn mover for long term storage. they all have carburators that get gunked up thanks to the nasty modern gas formulations.

Starting snow blower best stuff for starting small engine's

Works like it says.

keeps everything running well

Can't go wrong with this stuff. Keeps fuel fresh an engines operating at peak performance.

great product....

I ran a can through my RV Generator. Improved the running considerably. Used to surge. Now runs smoothly.

Always use it

I have used SeaFoam products for several years and have always been happy with them. This stuff is quite versatile as a cleaner and performance improver, and the price is right. Am I an engineer or qualified to claim this stuff helps motors? Definitely not. As a product user, do I feel like it's keeping my vehicles going? I wouldn't be spending money on it if I didn't. I have an American V8 truck with well over 100k miles that has been getting SeaFoam fuel treatments, intake cleaning, and oil flushing through most of its life, and it's still running; seems like good enough reason for me.

Always use really good for vehicles

Won't put anything else in my BMW. The BMW service tech was amazed at how high my engine compression was and my fuel filter was like new. Highly recommend for every car after each oil change. I suggest, After each oil change bc its easy to remember to put this in a tank of fuel regularly.

Recomended by moto racer

I did everything to take care of the Toro HD 1030 snow blower I just purchased 09-2021I let the engine use up all gas tank, the Dealer told me ok you don't have to drain extra gasleft in the carburetor, he lied it gummed up it will only start for 5 second then stall out in09-2022 - he thinks I will call him for service for 99.00 - I stabilized the gas when using itto prevent this - I empty the gas tank poor sea foam into tank to try to get in enginefor 2 days then put 1/2 tank of gas to have it run It started white smoke out carburetor let it sit for 2 minutes start engine started - engine so much cleaner without stalling.

Used this in my scooter and now the scooter runs better than before. Use 1oz for every gallon of gas

Use this in my gas can for lawn equipment. Keeps the gas fresh and engine components clean.

I have been using this product for many years and have had great results. All my vehicles have run smoother and have showed better gas mileage. Literally pays for itself!

Sealike foam with a very foamy sea-ish quality