Thad D

I used Chem Dip today to clean the CARB on my Farmall 450 tractor and now it runs great. Before today the tractor would not run unless it was at full choke, I had rebuilt it but only used spray cleaner at that time. Submersion cleaned everything completely and now it runs perfectly.


Several years ago while working at a gas station a guy came in with his car smoking and limping along. Glen, the owner, told him that it needed a valve job and would cost a couple hundred bucks. The guy said something like, “OK, I don’t care, just fix it”.

The guy left and Glen, the station owner, parked it at the far corner of the station lot and poured in two cans of Berryman’s Chemtool into the oil and another can into the gas tank. He let that car sit out there idling for about three or four hours. It smoked like a burning tire for quite some time. He shut it off, changed the oil and filter and I took it for a test drive …. ran smooth as silk.
He then steam cleaned the engine, painted the heads and valve covers and charged the guy for the valve job.


I have a 79 Suzuki GS850g. Started to lose power while running and stalling out. Was going to get a carb rebuild, but tried the Sea stuff to no avail. Decided to try this product. Used 15oz in about 3 gallons of gas. Bike was running smoothly within 1/2 an hour. Would 100% recommend and will continue to use.


Used it in my mothers 2005 Nissan Altima, without it car misses and has P0301 truble code, started using an miss went away and check engine light went off.


My check engine light went on and the mechanic tested found it to be the CAT, i saw a forum someplace and they suggested Berryman’s B12. Soon as I added it to a full tank in my Honda check engine light off in 2 days.
I had a harder time with the 2000 Miata. I added the B12 and my car kept firing randomly which caused me to remain wherever the heck I was until it took pity on me and started. I waited for another fill up and added more. So I get to a mechanic and he says I need a $700 new CAT. My car sat in that lot not starting for over 1/2 hr. Finally it started, I get on the highway and couldn’t get it past 40mph. I pulled over and revved the engine for under a minute and pulled onto the highway with a brand new race car. I’m waiting and waiting for the 60 to get here to clean it all up. Instead of a new $700 CAT cost me $4 for a can of cleaner.


I have a 1999 Dodge Status with 184K miles on it. I was considering replacing all of my fuel injectors as I had at least two of them barely working and I had rough idling and poor gas mileage (~10 MPG). I witnessed the HEST test and I decided to try the B-12 Chemtool ($4.99 at my local parts store). I put a can of it in my empty tank and then filled to a 1/2 tank with premium. Holy Cow!!! My injectors are all firing 🙂 Yay!


Absolutely the best fuel additive ever! Vehicle was having all sorts of problems lagging, choking up, dying at idle, etc. Used one can of this in 3/4 of a tank of fuel, got on the highway, drove 30 miles out and 30 miles back at 60-70 MPH and by the time we got home the engine was purring like a kitten. Thank you Berryman’s!


My daughters 05 Mercury Sable 3.0 DOHC with 73k was running awful and showing multiple codes such as: p0430 / p0174 / p0316 /p0305 / p0306/. A local shop wanted to charge $600 to replace several parts. Knowing I had used STP injector cleaner a week or two before the car started acting up I didn’t think any more cleaner was necessary or would even help. I was about ready to give in and pay for the repairs to help her out when I seen your B12 ChemTool product at a local Meijer and decided to give it a try. After a couple several mile test drives it started to run like new! No more codes either! I’m so thrilled that your product worked so well I bought a few more bottles for preventive maintenance in my other vehicles. We are so relieved and grateful to avoid a costly and unnecessary repair. “Thank you!” really “Thank you!”

Danel Cianci

Hello. Been using your product with Marvel Mystery Oil and with full synthetic oils and also in the gas tank and went 230,000 miles on the 2000 Ford Escort and really great engine performances characteristics and gas mileage.Now using in my brand new 2014 Ford Fiesta in oil and the gas tank along with the Marvel Mystery oil and Motor Coat in oil and gas mileage going to Florida and Texas for the winter as Chicago is very cold and gas mileage us 57 miles per gallon with all my clothes and heavy 2 down blankets and 2 heavy sleeping bags and everything in trunk and the whole car all my stuff.


1999 Infinity Q45 with 170,000 miles, started to hesitate and lag bit. The car part store employee pushed Lucas and Sea Foam, so I researched online to compare results and found B-12 Chemtool.
This products works and is less expensive, great value!