Just a little background semi education on some of these for you guys. When your looking at products like this break it down to the actual active ingredient, the one that actually does the work. In the case of Techron it's called; polyetheramine or PEA
Once you know that look up the other additives that have higher concentrations of the ingredient by searching the various MSDS data bases. IIRC Techron quit putting PEA in for some reason (Probably cost) so now you'll have to get it in other places.
https://cglapps.chevron.com/msdspds/MSDSDetailPage.aspx?docDataId=283264
Amsoil PI
Hydrocarbon solvent………………Confidential………………………44.4 – 53.6%…………………N/E
Polyether amine……………………Confidential………………………27.7 – 36.9%…………………N/E
Petroleum Naphtha…………………64742-94-5……………………... .9 – 4.5%……………….……N/E
Substituted Aliphatic amine………Confidential…………………….….9 – 4.5%………….…………N/E
Naphthalene…………………………91-20-3……………………………. .0.2%…IARC Suspect Carcinogen NTP Carcinogen
Regane Complete Fuel System
KEROSENE 8008-20-6 60 - 70
POLYETHER AMINE MIXTURE 30 - 40
Techron Concentrate
Distillates, hydrotreated light 64742-47-8 < 50 %weight
Stoddard solvent 8052-41-3 < 35 %weight
Solvent naphtha, light aromatic 64742-95-6 5 - 10 %weight
Benzene, 1,2,4-trimethyl- 95-63-6 1 - 5 %weight
Xylene 1330-20-7 0.1 - 0.5 %weight
Techron Concentrate PLUS
Distillates, hydrotreated light 64742-47-8 < 55 %weight
Stoddard solvent 8052-41-3 < 35 %weight
Solvent naphtha, light aromatic 64742-95-6 3 - 7 %weight
Benzene, 1,2,4-trimethyl- 95-63-6 1 - 5 %weight
Xylene 1330-20-7 0.1 - 0.5 %weight
AMSoil and Redline have better versions with the actual ingredient;
http://www.amsoil.com/storefront/api.aspx
http://www.redlineoil.com/product.aspx?pid=80&pcid=12
http://www.redlineoil.com/content/files/tech/S1-1 Tech Info.pdf
Good reads;
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1215655&page=1
http://205.243.146.146/forums/ubbthreads.php?ubb=showflat&Number=1183815&page=1