Berryman B-12 Chemtool Fuel System Cleaner, 15 oz

For years I have been using Berryman's B12 for routine maintenance and deep cleaning. Where I currently reside it gets pretty cold for a few months out of the year, people Park there carbureted toys for several months and call me up wondering how much it's going to cost them to make it run right again and I tell them about $10. What you need to do is throw in a can of this stuff right here and fill your tank with some premium fuel and let it work its magic. This stuff will absolutely clean up any residual residue from bad quality fuel or gas that sat all winter. You can also use it for preventive maintenance like adding it to your tank before you plan on storing it to act as a fuel stabilizer or simply pour in a can a few times a year to keep your fuel system sparkly clean. Other brands like Seafoam have national recognition for their long-standing reliability but this stuff works just as well if not better at half the price.

I’ve been using B12 for 4 years now it’s always helped my cars out with improving gas mileage and overall performance. I recently bought a car with 2 check engine codes for rough idle and catalytic converter. After I put a can of this stuff in my tank and drove it 100 miles the check engine light turned off, and both codes were gone. It saved me a lot of money! I highly recommend it. I just wish they’d keep it at this price because it has been going up a lot over the last year.

...if only temporarily. It won't replace a trip to the mechanic, but it got a stubborn reoccurring check engine light to go away before I had to get me vehicle smogged. This stuff is great.

I've used Berrymans B12 fuel injector cleaner several times on my 2018 Toyota RAV4 and my 2015 Toyota Camry. It fixed issues with rough idling, slow acceleration, acceleration hesitation and stalling. First can results! After researching this I've found out that lower fuel quality in general is what causes the issues so this is not a one and done solution. I mainly use Shell and Texaco fuel stations so its not like im using no name fly by night stations. Fuel quality is just not what it used to be. I use Berrymans after the issues recur and it clears it right up each time. I haven't tracked it but I'm guessing I've used it one out of four fill ups. More on my 2015 than my 2018. This product does what it says it will do at the best price for what it does- which is clean fuel injectors. If you're looking to get your car running better and you don't want to pay a mechanic $150 or more for fuel injector cleaning service, Berrymans is the best solution I've found.

Quality product priced cheaper than any of the local parts stores! As Derek Bieri from Vice Grip Garage says, just pour it into the gas tank and “let it chew on it” My wife’s vehicle is direct injection, which can cause a buildup of carbon on the valves. I use this product on every other fill up on her vehicle.

This is the only product that I've seen with my own eyes that works. Many years ago, I pulled the heads off of a Chevrolet and they were clean along with the top of the pistons. I asked what they used and they said Berrymans B12 just before an oil change.

At 263,000 miles, my usually smooth inline 6 cyl, 4.0L engine started idling rough and using more fuel. Based on a tip, I got this stuff and used two cans for the first fill-up and then a can per tank for three complete fill-ups. Apparently, the fuel injectors needed some love and this product actually worked. Now I use one can every oil change. It's weel worth the price.

Does just what the writing on the can says it will do. I have revived many small engines that had filthy fuel tanks and gummed up carburetors. Once your small engine has been cleaned, use this to maintain it! Really good product I have purchased many times.

This product works even better than it's main competitor that is sold many places including convenience stores and gas stations that is call Seafoam and is nearly half the price. We have used it in everything from vehicles, mowers, 4-wheelers, boats RVs, you name it. We use it whenever a motor has not been run for some time like over the winter for example.

Best fuel and cleaner. eats paint..others do not. safe for catalytic and air mass. add to the tank or spray in air cleaner opening. drops RPM 200 right now..used 248000 on old 84 datsun nissan truck..still doesn't use oil. cleans tank ,fuel injection ,spark plugs. Decarbonizes head and piston chamber..It smells good like nail polish remover..evaporates very quick no residual. Caution it eats paint. Old dirty tanks may break out varnish and need 2 cans.one after another..safe on gaskets. I have used for many years. Even on lawn mowers..and as a degreaser..Love it..WORKS!!