2616 B-12 Chemtool Total Fuel System Clean-Up Easy Pour-In Metal Can, 16-Ounce, Fluid

I noticed a smoother idle and better throttle response almost immediately after using this. It’s an easy pour-in solution that really helps clean out the system. Highly effective and affordable!

My F150 threw a code for one of the fuel injectors. I ran a few tanks of premium through it and the light kept coming back. I filled up with 93 again and added a can of this. Light never came back on and my OBDII reader shows no codes. Amazing product. I purchased 2 more for my other vehicles.

I'm sure this works as promised but I'm afraid I was past the point of having it solve my misfire problem. I did feel that it helped as the engine would run fine sometimes and other times it would misfire on start up and then run fine. Before I completed the tank about 1 week of driving I decided to bring the car into the dealer and have them resolve the problem. It cost $1,060 dollars and runs without a misfire but that's a lot to pay for a smooth ride. I would use this again if the motor starts misfirig again before bringing it to the dealer.

Strongest fuel injector cleaner I know of, also used to dissolve JB weld

One Caveat: I had added a bottle of the same brand's carburator and injector cleaner before using this, so you probably won't get such quick results with the first bottle. Nevertheless, after I started driving after adding a bottle of this, within a short time, my car had a relatively smooth idle and the oil light never came on in traffic. For 5 years, the oil light would come on when idling or in traffic, no matter how clean the oil or how full the crankcase were. I learned to deal with it and manage it (more viscous oil, accelerating when possible, etc.). But since I used this, it has not come on once (except when starting, but so does the check engine light; they are on by default when the engine is not on but the car is). Again, since I used their less potent fuel cleaner before, it probably sped up the results. But that said, at worst, that just means I would have needed 2 bottles (at most) of this stuff to have a car that can idle smoothly. It's kind of amazing. The only time I have ever seen such noticeable results with a fuel additive was years ago when, after never having maintained by car beyond a few oil changes, I added Techron to my gas tanks and my MPG went up 3 MPG after 2 treatments (which for a van that only got 12 MPG in the city before, is a big deal). So, if your car has engine issues, I'd definitely give this a try.

I had a engine that was surging and would stop running. I added B12 to five gallons of gas. With in a couple of days of running the machine it cleared up and now runs smoothly. I have tried many different additives. This is the only one I will ever use from now on.

The solution in a can has long been the easy way to drain money from a sucker. This however is not that. I had motorcycle carbs that definitely needed to be torn down from sitting too long. So just to try something while I got an appointment to take the bike in, I got this as a suggestion. After treating the gas twice my problem was solved, but more importantly it didn't come back. So between this and marvel mystery oil I have a few options that I know will work instead of just making my wallet thinner.

I got this as preventative maintenance rather than to fix an obvious problem so I can't honestly comment if this worked or not, which is true of all all preventative maintenance. If you change your oil every 3K miles, did the fresh oil "work"? Yes, but you'd never know unless you never changed your oil. Same thing here. For $11 every now and then, I'm OK giving this a whirl, but I'm not a reviewer who can tell you "I had an engine that ran terribly and after one can of this it ran marvelously!"

We have to wait longer to see results so far so good.