The Berryman H.E.S.T. Test The list of solvents and their Solubility Parameter is provided to illustrate the difference in energy that solvents possess because of their different molecular structures. This parameter is measured in calories per centimeter (cal/cm.). The larger the value of Solubility Parameter, the greater energy the solvent has to dissolve gum, varnish and other fuel system and engine deposits.
You only have to compare labels to determine which fuel additive products contain H.E.S.T. The use of strong, high energy solvents, combined with state-of-the-art polymeric additive technology give Berryman Products a more complete combination of available chemical technologies. It provides the one, two, punch to knock out engine and fuel system deposits. See the differerence! H.E.S.T. Test Video H.E.S.T. Test Video - In Spanish
I used the fuel treatment in everything I own. It actually made my ATV run better. I'm going to try to use it to "bottle feed" my newly aquired motorcycle that will not run due to gummed up carbs. Lets put this stuff to the ultimate test!!! I can't find your products in many stores near me and I'm forced to drive and buy a few bottles at a time. Thanks for developing a great product!! I'm a life long user at the age of 29. Kudo's Don - Wisconson
My HESTimonial is simple, I have been using and selling Berryman B-12 for 23 years. I have always had happy customers with Berryman B-12 products. Rod Rodriques
Whether a sluggish engine or just some TLC for my 99 camaro, I buy a can of B-12. At 16 I bought my first can of B-12...seven years later, that same car still runs like a champ! My husband and I both agree B-12 Chemtool's H.E.S.T. technology is to thank! Berlin Morin
Having wasted my money on a couple of different brands of watered down part cleaners, I now stick with Berrymans. Matt Miller
My 1999 Acura TL with 200,000 miles began idling roughly. With one bottle of B-12 the idle smoothed out and the car ran noticably smoother. Richard Meir
B-12 Chemtool fixed my Maximz when the dealership couldn't after having it for three weeks! Karen Adamson
50K miles on my '07 Accord, so I grabbed the gas treatment just last week. Can already tell there's a little more giddy-up in it's step. Thanks Brain Bair
Like my grandpa always said, "If you had used a can of Berryman, you wuldn't be paying the repair man". Pratt Wellman
I used the System Cleaner in my parents 2000 Impala with 140,000 miles on it. There was a marked improvement almost right away! Terry Koontz
I have used Chemtool for years and while there are several Chemtool alternatives they are all poor substitutes for the real thing. I have also used the Fuel System Cleaner with the Fuel Additive with great success on my 1983 Suburban and a 1995 Camery. James Watson
Trusted products like WD-40 and JB Weld you buy knowing how they perform. Berryman B-12 with HEST is like that. Products you know and trust! Jack Junod
For years Ihave used this excellent product in my shop. We use it on anything that needs a oil or grim cleaning. It is very fast and inexpensive product... HIGHLY RECOMMENDED... Bill Halliburton ASE Master Tech 35 yrs.
When I add B-12 to the fuel in my truck, it improves my fuel economy 2.5 miles per gallon. I use nothing else. Flint M. Stone
I have been in the automotive business for over 35 years and the products I have always used and recommended have B-12 on the label. Larry Helton
This is an essential tool for all my engine needs. I keep a can around to keep the carbs clean on my tractor, lawn mowers and especially my 1968 Chevy Camero. This is an awsome product! Kirtland Speaks
We use the Gas Treatment in all of our fleet vehicles and have had zero injector issues. Ted Dawson
I've used Berryman's B-12 Chemtool since owning my first car at 16. I would have used it since 1918, but I wasn't born until 1941. Tom Shelhimer
January in 30" of snow, my car was barely idling. 5 cans STP, nothing. One can B-12, less than 5 minutes, Ferrari Time Baby! Randy Thelander
Chemtool is a generational product in our family. Used by my father, his three sons and their sons; for automotive and other solvent needs. Ross Miller
I have been using Chemtool since 1978. Use it in my cars and motorcycles. Tried the cheaper products - they don't work. Berryman is the best! Larry Starks
Berryman Products have been part of my automotive care and maintenance program since 1996. From additives and cleaners to sealants, Berryman Products are a must for any gearhead and automotive enthusiast. Steven Braud
I have worked with Berryman B-12 for over 30 years in the automotive business and there is nothing else that can compare. Great Stuff! James Sebolt
I use Berrymans with my race car parts. I also sell it by the pallet loads. It is the best stuff on the market. Brandon Chance
Berryman carb cleaner saves me gas money in a time when I need it most! It's a lifesaver! Tim Miller
I had two Jetskies that seemed like money pits because everytime I needed to use them I had to replace the sparkplugs. I started spraying Berryman down the hatch and BOOM starts right up. Berryman you saved me money and the planet at the same time, Money, in me buying less sparkplugs and the planet because I did not have to throw away my old sparkplugs as often (less trash). You are AMAZING! Kolter Jennings
I love B-12 and have for years. There is nothing better on the market for cleaning fuel systems and adding power. Jim Herlevic
This is the only product that keeps my engine running like it's brand new. If I don't use it tends to make funny noises when I accelerate. LOVE IT! Matt Lilly
I used Berryman gas additive in my car and it definately improved my gas mileage. Jamie Moore
I love the products for all my automotive needs. The carb cleaner is awsome. Richard Ingram
I always add B-12 to my cars and toys anytime a cold front comes thru and dramatically drops the temerature. Never had a water related problem! Dale Shields
Berryman Products have proven to be a class act in maximizing performance, starting and saving on gas mileage. I have noticed a cruising speed, acceleration and overall car performance from using the B-12 product. As a direct result of my "magic like" car performance, I have gotten 15 of my close friends to use the B-12 with all excellent feedback. I'll keep getting people to use this product. Kevin Moon
I used my first B-12 Chemtool when an employee of Berryman introduced me to the product many years ago. I have been blown away with the results with better results. Awsome!!! Darren Whitehead
I have used Berryman's for carburetor and parts cleaning for over 20 years. It does an excellent job in all applications. Charles P. Bell, Jr.
After using B-12 Chemtool® Total Fuel System Cleaner my car ran like a fine tuned machine again. B-12 Chemtool® is great. Vincent Harpe
Used B-12 in all 4 of my Chevy Astro Vans! The lowest mileage on any of them has been 300,000 +. B-12 is great. Greg Hansen
I recently purchased and used some Berryman Gas Treatment which helped my gas mileage by 10 miles per tank. McDonald Moore
I started using Berryman B-12 Chemtool about 6 months ago. I find my engine runs smoother and gas mileage has gotten a lot better. I will continue to use this product. Linzy Cheramie
I have used B-12 for over 20 years on motorcycles, lawnmowers and anything else that needs a little help getting started and cleaned. Brian Spain
I was having problems with my Mitsubishi Eclipse 01 V6 making a ticking noise in the valve train and bought the B-12 Chemtool Total Combustion Chamber Kit. The noise went away and purrs like a cat with 125K miles on it. I would like to get more kits because I am a roving mechanic and want to help others with their maintenance. Jim Runyon