It is pretty difficult to judge whether or not a product like this has made a difference or not. I purchased this based on a video by Scotty Kilmer who is a youtube car guru who yells instead of talking about cars. (maybe he has too much caffeine before he records his videos) He talks about the active ingredients that are more appropriate for modern cars than Sea Foam. (this bottle looks like a bottle of Sea Foam oddly enough)

I used it in the gas tank in an attempt to clean out old fuel injectors. The placebo effect is pretty strong when it comes to using additives. I hope it did clean the system and I could say that it did something perceivable but chances are that even if it did clean the injectors it would be a very subtle difference. With ethanol in our fuel in most states I'm not sure that is a big concern anymore.

Scotty points out that the old 'carb cleaner' products do not contain the correct additives for our modern fuel injected cars but this product does contain the proper ingredients.

Works well from what I can tell. Used in a 2000 tacoma that has over 240k miles. It had been sitting for years without running. I put this both in the oil and fuel. I used an inspection camera to look inside the cylinders. They looks slightly cleaner. Might have been from actually running it for awhile after sitting for so long.

Good product

Good stuff buy discovered W-M has their brand for half the price.

Great product.