Guess the Techron 5000 blurb sounds an advert from Caltex. here is the original whirlpool post
forums.whirlpool.net.au/archives/933463
schroll down about twenty posts to wilbyz user 3548
Roger Costello posts that Techron 5000 (not the 1000 product) was developed in the USA by Chevron (Caltex parent company) to comply with Californian legislation that demands fuel additives be contained in all fuel. The principle reason is removal and prevention of carbon build up however at the same time Techron 5000 also prevents fuel contamination by soluble items commonly refered to as "gunk". My car had been left standing on the car lot throughout a Canberra summer in temperatures well over 40-50 deg C. Unused, never started with at best 5 lts of fuel in the tank that caused fuel evaporation to coat all internal fuel surfaces, tank, pump, pressure control valve, carburetor internals with a shellac that once re immersed in fresh fuel broke down into a first stage glutinous long stranded substance that cloged all fuel flow passageways. Fortunately the Civic D15B4 twin carb only has a choke blade on one carby, the left side one. That is the principle cause of carby malfunction, it is the idle and slow jets here that prevent cylinders 1 and 2 from firing. 3/4 are less affected and will manage a partial fuel flow. From a two cylinder engine, with the patience of Job, one must daily run the engine to commence dissolving the glutinous glug from all jets, passages, air and fuel, bowl etc from both carbies. Takes time but each run gets more Techron 5000 into where it is needed. Overnight solubility occurs also. Three days in the underground car park was needed to even get it outside. From then on each running improved performance but it was nearly a week of 15 minute runs, at first 1850 rpm, until I could get 3000 rpm out of the engine. Three months later I could rev up to 5500 if I had wanted. As I posted earlier $15 total cost, plus the 98 ron fuel not $1700 for a carby removal, strip, clean, rebuild and install plus the tow truck. I really cannot detect much difference from running a 9.2:1 compression engine with either 91 RON or 98 RON fuel.
Chevron USA or in Australia, Caltex, Techron 5000, a product invented, manufactured and sold exclusively by Caltex is unbeatable, maybe the others work, I do not know nor care.