Sea Foam SF16-12PK Auto Marine Motor Treatment, 192 fl oz, Pack of 12

This fuel conditioner is hands down the best choice of any. I have run it in every single vehicle and motorcycle I have owned. Treats fuel for storage, and cleans your engine and keeps it running smoothly and efficiently.

Great product

However....tends to drop your mpg about 3 miles. Ish. Use it every other fill up.

I been using sea foam for many years and works wonders in my car engine oil and gas tank. I also add it to my lawn mower and snow blower. It keeps the gasoline fresh and keeps the engines clean. Going back to adding it to my engine oil: A few hundred miles before I am going to have an oil change, I add approximately 3 ounces to the oil. I continue driving my vehicle on a daily basis. When it’s time to change my oil, it comes out super dirty. ( this is by design and you want your oil to look like this) what is happening is the Sea Foam cleans out all the oil varnish buildup and carbon inside your engine. (This is a good thing) Sea foam is also super for cleaning dirty throttle bodies too! Carbon / varnish get all gunked up on the throttle body and can make your car run like crap. Rough idling, stalling etc. Purchase Sea Foam spray with the cleaning tube. Sea Foam will clean out your throttle body and make your car run new again. (Make sure your car is running when you do this)

Works very well I use it in all of my fuel tanks