franky s

another revised update the 2008 kia rio still going strong at 335,000 miles thanks to b-12 chemtool use along with marvel mystery oil since it was new. truely great products.

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.

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!


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.


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!


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!


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.

Tony T

Plain and simple, best stuff I’ve found. Best price hands down . Outperforms all others I’ve tried. Value can’t be beat. Never let me down . Never disappoints. Personally used it in over 20 cars, many repeatedly , with no adverse effects /damage to the vehicle. Great stuff. No B.S. Money well spent! Glad its going strong and is available in more places than ever, still for a hell of a price. Thanks Berryman again!

Tony T

Been using it for years . First heard about it at the drag races. VEry surprised , and even made skeptical , by the great price. Price has managed to stay low throughout the years. Have tried many other expensive,even professional, products. This one always seems to work. Stopped wasting money , and started saving it instead. Used it countless times on cars and trucks , new and old. Have even argued with auto parts employees over it, when they try to sell me seafoam or STP (on sale). Ive even had one say that its too strong and will cause my seals to dry /crack……. Nver happened . I used it for the whole lifetime of my Nissan,as a fuel addititve , and as a solvent to clean my injectors directly through the intake. always felt the diffrence immediately. Never ever felt like i wasted my money and got robbed (unlike others). Never had no engine trouble. Sold it at 280000 miles going strong. Repaired the valve cover seal , my friend (long time mechanic)thought i had a rebuilt engine because it was so clean inside. I have amazed and made many other believers of friends, by helping them tune up/maintain there car using berryman b-12. First they are skeptical, think its too good to be true, waste of money. Once they experience the difference in power. Smooth idle. Car even starts and feels and sounds different. Ive had some older cars feel renewed instantly. Now everyone is constantly wanting to use it on there cars, or asking me how to do it again. They all want to know so they can help other people/themselves with there car maintinance. First and only mandatory , and consistent product on my list for tune up supplies. Other items can be substituted , But for Berryman there is no close substitute. Thanks to Berryman for offering such a quality product and keeping it affordable. Helps many people , especially when times are tough to keep there vehcles running great!