Features:

  • Contains 100% high-energy solvent technology
  • Helps keep injectors or carb(s) and intake ports and valves clean
  • Quickly disperses moisture and dissolves gum, varnish, and other fuel residues
  • Disperses moisture in conventional gasoline
  • Catalytic converter and oxygen sensor-safe. Item has less than 3% Acetone.
  • Use on the entire fuel system, fuel tank, fuel lines, fuel injectors, valves, rings and pistons with H.E.S.T.
  • Ensures higher compression, fewer repairs, lower operating costs and increased spark plug and injector life
  • Fit type: Universal Fit
  • Quickly disperses moisture and dissolves gum, varnish, and other fuel residues
  • Use on the entire fuel system, fuel tank, fuel lines, fuel injectors, valves, rings and pistons with H.E.S.T.
  • Ensures higher compression, fewer repairs, lower operating costs and increased spark plug and injector life
  • Catalytic converter and oxygen sensor-safe
This stuff works!

I was using Seafoam for many years, but the price was outrageous. I picked up B12 one day at a local auto parts store and haven't looked back. B12, hands down, works much better than Seafoam and has worked some miracles on some engines that have been sitting for years and years. I do not use this regularly in my engines, really only once I start noticing issues or when I need to clean the carb. This stuff will strip baked-on carbon from heads, pistons, and valves without issue. Most of the time it's powerful enough to clean a carb without taking it apart as long as you are patient. I recently was working on a gas-powered air compressor that has been sitting for over 10 years with gas still in the tank. After draining the gas, I poured half a can of B12 in the tank along with about a gallon of gas and poured a little more B12 directly in the carb. I let it sit overnight and came out the next day and it fired up after about 10 pulls. With newer fuel-injected systems, don't expect this stuff to fix everything or shut off a check engine light, but if you have an actual fuel delivery problem due to buildup or grime, this will clean it up amazingly.

Works as advertised. Buy it!

After doing some online research, I tried it and discovered that Chemtool B-12 actually works. Bought a few cans, added to our two cars over time, and noticed a district increase in responsiveness and power. It is extremely gratifying to buy an American made product that does exactly what it says it will. Do not hesitate. Try it, you'll see.

Miracle juice for carbs and injectors

After a long winter rest, our 2006 Yamaha Vino had a power hesitation when accelerating. Care is taken with our faithful scooter which has only 1,400 miles, and always parked in our heated underground garage. Was about to remove the CARB to clean the jets, when a mechanic friend convinced me to try a CARB cleaner first. After seeing Google reviews, chose to go with Berryman B-12. Put in half a bottle into gas tank containing one gallon of fuel. Started and idled for 10 minutes. Drove off and dead spot GONE!!! The 50cc Vino even runs smoother. Poured in one bottle into our 2015 Honda Fit (30,000 miles) with a FULL tank of gas. After 40 miles of highway driving it has, likewise, become sounding and feeling smoother. Extremely impressed with results. This product is so affordable, it's worth the exercise BEFORE contemplating any fuel system disassembly.

Waiting for the catalytic converter light to go off

Both my cars have the engine light on and were d'xed with catalytic converter issues. This stuff supposedly cleans your engine while running and hopefully it will clean the cat and I won't need to buy 2 new cats. That's expensive. This is a first resort. AND result is in the Honda check engine light went off. SO IT WORKS!!

Strong amazing outperforms seafoam.

I had been using seafoam for years and came across this product and through garage research and motor applications this outperforms seafoam ,amazing product!

Best fuel cleaner on the market

My father used this product starting in 1965 in Northern California. He was a mechanic for over 55 years and never used anything else to clean fuel systems in the hundreds of cars he owned during that time. I personally have been using this product for every vehicle I've had since 2004 and never had a problem. Not only is it reasonably priced, it cleans any fuel system imaginable with precision and ease. I recommend this highly to anyone that is having problems with their vehicle, or simply want to keep their fuel system clean.

Perfect for a Vespa.

My Vespa just turned 18,000 miles and it has been a absolute beast. Decided to spoil it with new fuses, replace reflectors, and general maintenance ive let slide. Enter this product, I added exactly 4oz into my 2.5 gallon gas tank and filled it up. I gotta admit that once it integrated into the engine that it is running NOTICEABLY better. shocking. idle is better, smoooooth, and overall feels like new again. amazing. Highly recommend!!!

Definitly improved the running of my fuel injected 1992 F150 ...

Definitly improved the running of my fuel injected 1992 F150 4.9L truck. I had trouble with starting and then stalling when cold and on tip-ins when accelerating. Both of these problems have dissapeared after using this product.

Helps keep small engines running.

If you have small engines that don't get fired up very often or run roughly, just pour some of this in your tank. Cheaper than rebuilding the Carburetor. I put some in my Onan Generator, helped it run better, and saved on costly repair.

It keeps the fuel system clean

This product does a very good job of keeping an automobile fuel system clean when used regularly ( I use a can in the fuel tank about every 1,000 miles. It also helps reduce water in the fuel, caused by Ethenol breakdown. The price from Amazon is below market, so it is also a good buy.

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