So.....my local walmart just got this stuff in, couple weeks ago down the oil aisle....appears to be the "Sea Foam Competitor" 
In fact, same bottle design (yes, the annoying domed top that is hard to maneuver into some gas tanks....), and $2 CHEAPER even (with the current $1 off coupon floating around my store anyhow...).
So....curious I was, at what this stuff really is...I was reading the bottle, seems very much similar to Seafoam, same applications, same uses....BUT it does have an "extra" added use as a "quick flush" - 1 pint (the full can) to a 5 qt. crankcase, with the engine idling for 10 minutes, prior to oil change.....
The other directions, seemed very similar to Seafoam, 1.5 oz. per quart of oil, added to the crankcase, post-oil change, or "pre-oil change" (i.e. 400 miles before next oil change).
1 can to the gas tank, treats 16-30 gallons of fuel, with the same "benefits" of Sea Foam.....
The big "attack" seems to be about alcohol, and how the STP product does "NOT" contain any alcohol which can harm traditional combustion.....or something like that....I can sorta understand it....but then I think back 10, 20, 30 years ago, and my dad used HEET all the time! Which is basically the same thing, Isopropanol (aka, 100% rubbing alcohol.....the stuff you get in the pharmacy over the counter is likely only 93% "alcohol", the rest is h2o :P)....but yea, and he never had car problems...
Sooooo.....with the addition of the "quick flush method" my thought, is this stuff must be an actual "oil" since they are notating a use as a quick flush.
Sooo.....as any curious BITOG'er, I perused the web for the latest and greatest MSDS....
Sure enough, found it, quite crisp even, dated 6-2011 
And wow, what a bland MSDS....
So....I did some Searches (thank you BITOG by the way...lol - some of the chemicals have been referenced here previously....
Petroleum naphtha, hydrotreated light CAS # 64742-47-8 was the first one I looked up....with a concentration of 10-100% which appears to also be in the Chevron Techron bottles, as well as Johnson's Fuel Injection Cleaner, some car wax.....some sources says it's equivalent to "Mineral Spirits", or "low odor solvent"
Then there's the Diphenylamine CAS # 122-39-4 at 0-10%
And that's the one I wasn't too familar with....Wikipedia points to some usage in apples..use as a pre or post-harvest "scald inhibitor" for apples....basically protects the apple from oxidation during storage....nifty eh?
That particular chemical has shown up on these forums....but only in "motor oil" threads....not as additive use one Briggs and Straton oil thread, one Mobil Drive Clean Blend thread, a "Pennzoil" thread that referenced this chemical use in some Amsoil oil, as well as a Mobil 7500 SM thread.
But as with all MSDS, we gotta be careful....they clearly do not tell the whole story :P I can't see that STP bottle containing 90% mineral spirits, and this apple tree antioxident :P
In fact, same bottle design (yes, the annoying domed top that is hard to maneuver into some gas tanks....), and $2 CHEAPER even (with the current $1 off coupon floating around my store anyhow...).
So....curious I was, at what this stuff really is...I was reading the bottle, seems very much similar to Seafoam, same applications, same uses....BUT it does have an "extra" added use as a "quick flush" - 1 pint (the full can) to a 5 qt. crankcase, with the engine idling for 10 minutes, prior to oil change.....
The other directions, seemed very similar to Seafoam, 1.5 oz. per quart of oil, added to the crankcase, post-oil change, or "pre-oil change" (i.e. 400 miles before next oil change).
1 can to the gas tank, treats 16-30 gallons of fuel, with the same "benefits" of Sea Foam.....
The big "attack" seems to be about alcohol, and how the STP product does "NOT" contain any alcohol which can harm traditional combustion.....or something like that....I can sorta understand it....but then I think back 10, 20, 30 years ago, and my dad used HEET all the time! Which is basically the same thing, Isopropanol (aka, 100% rubbing alcohol.....the stuff you get in the pharmacy over the counter is likely only 93% "alcohol", the rest is h2o :P)....but yea, and he never had car problems...
Sooooo.....with the addition of the "quick flush method" my thought, is this stuff must be an actual "oil" since they are notating a use as a quick flush.
Sooo.....as any curious BITOG'er, I perused the web for the latest and greatest MSDS....
Sure enough, found it, quite crisp even, dated 6-2011
And wow, what a bland MSDS....
Quote:
Ingredients Concentration Worker Exposure Limit
Petroleum naphtha, hydrotreated light 10 - 100% 1200 mg/m3
TWAb
CAS # 64742-47-8
Diphenylamine 0 - 10% 10 mg/m3
TLV-TWAa
CAS # 122-39-4
a
TLV-TWA = ACGIH Threshold Limit Value - Time Weighted Average
b
Based on supplier recommendation.
None of the ingredients in the product are on the IARC, NTP, or OSHA carcinogen lists.
one Briggs and Straton oil thread, one Mobil Drive Clean Blend thread, a "Pennzoil" thread that referenced this chemical use in some Amsoil oil, as well as a Mobil 7500 SM thread.
But as with all MSDS, we gotta be careful....they clearly do not tell the whole story :P I can't see that STP bottle containing 90% mineral spirits, and this apple tree antioxident :P
And yes.....there seems to be a "new kid on the block" now too.....CRC has joined the scene and now have a "Multi Use Lubricant" - in, I believe the same/similar can 
