Found floating on the web.... nice , break down. I made this file to show the differences between Injector cleaners. Some cost $2 others cost $13, the mid priced bottles are a best buy. This method does not come close to sending all your injectors for a clean and balance. Most cheap injector cleaners are just pure kerosene or alcohol., like $2 GumOut. Some MSDS forms say trade secret, but tell what chem. that is not toxic and would clean an injector? The top brands , tell the truth here. MSDS data: ------------------------------------------------------------------------------------------------- Techron Concentrate Distillates, hydrotreated light < 50 %weight Aka: Paint thinner(oil based) Stoddard solvent < 35 %weight Aka: dry clean solvent, white solvent Solvent naphtha, light aromatic 5 - 10 %weight : zippo lighter fluid Benzene, 1,2,4-trimethyl- 95-63-6 1 - 5 %weight : powerful toxic solvent Xylene , powerful solvent Techron is naptha and 3 kinds of benenze. ------------------------------------------------------------------------------------------------------- GUM OUT INJECTOR CLEANER (WINTER GRADE) Chemical Percent Trade secret or proprietary formula < 1 ( secret #1) Petroleum distillate(s) (unspecified) 40-70 ( most likely paint thinner) Detergent/Inhibitor mixture 1-10 ( secret #2 ) Isopropanol 30-50 (rubbing alcohol, GAS DRYER "CH3CHOHCH3") I can not begin to guess why we need more alcohol when all gas has it already. Gasoline, must contain 2% oxygen by weight, in most smog chocked areas of the USA. ------------------------------------------------------------------------------------------------------- Seafoam ingredients: 1 PALE OIL 4229 40-60% = A base or process oil refined until its color = yellow. 2 NAPHTHA 20 25-35% solvent powerful , common in all good injector cleaners. Zippo juice ! 3 IPA 125 10-20% = Isopropyl Alcohol (rubbing alcohol), Useless in gas , cuz it already has tons. in my opinion , putting oil into your gasoline is not too smart. Think about it? fouls plugs, makes lots of carbon , and messes up OXy sensors. You decide. --------------------------------------------------------------------------------------------------------- "GM TEC" ingredients: 2-BUTOXYETHANOL, a paint and ink solvent , used even in Clorox cleaner 409 Naptha, , raises octane rating of gas, , simular to Zippo ligher fluid. Coleman camp fuel. 4-METHYL-2-PENTANOL, (aka:Methyl isobutyl carbinol) used as a lacquer paint tinner 9-OCTADECENDIC ACID.(aka:Oleic acid, found in Olive oil) ( this acid is interesting) -------------------------------------------------------------------------------------------------------------- BG-44k: ( madly popular but little different than old Chevron Techron) Light Aromatic Solvent Naphtha , ( Zippo lighter fluid) 1, 2, 4-Trimethylbenzene , commonly found in up to 7% by volume already in Gasoline. Xylene ,(1,2-dimethylbenzene & 1,3-dimethylbenzene & 1,4-dimethylbenzene), xylol , powerful solvent Cumene ,(isopropylbenzene, ) powerful solvent,raises octane of gasoline. ----------------------------------------------------------------------------------------------------------- GUNK , RADIATOR SPECIALTY COMPANY, FUEL INJECTION AIR INTAKE CLEANER 2-Propanone 30-60 % aka: Acetone Ethylbenzene >10 % a powerful solvent Hydrotreated Heavy Paraffinic Distillate 1-10 % weak solvent Methanol 1-4% , solvent. Propane 10-30% , gas Toluene 15-45% ,powerful solvent Xylene (mixed isomers) 5-20% -------------------------------------------------------------------------------------------------------- Red Line SI-1 1-5% Alkenylamine - (a detergent ,even used sometimes,in baby shampoo) 1-10% Isoctanol - ( C8H18O , aka, 2-ethylhexan-1-ol, or Octyl alcohol) 1-10% 1,2,4 Trimethylbenzene , (C9H12 ) 5-20% Aliphactic Napthta , zippo lighter fluid. , aka: white gas, low octane) -------------------------------- Valvoline Complete Fuel System Cleaner 52 - 62% Kersosene 28-38% Light hydrotreated petroleum distillate 6-16% Stoddard Solvent ( stoddard is the name of the man who invented dry cleaning) Warning, some of the chemical names have 20-30 synonyms.Many companies use synonyms to hide the truth. Genius level hidding, IMHO. Bob the mech. More... http://www.autorepairwiki.org/Fuel_Injector_Cleaners