TECHRON - 266701317 Techron Concentrate Plus Fuel System Cleaner, 32 oz

This Techron additive is the best PEA (Poly Ether Amine) product out there in terms of the amount of PEA per oz you are getting. As a result, it works well in my experience on two different problems, within limits.a. It is VERY good at reducing or eliminating engine knock. However, you have to use it a while (longer than the marketing blurb of one bottle). In my experience, to rid yourself of engine knock, use TWO bottles on one tank of gas on a car, e.g. 20 gallon tank. (4 bottles on one tank of gas on a truck, e.g. 30 gallon tank) That is for the first use. Then after going through that tank in natural driving, then use 1 more bottle per tank for two more tanks. (On a truck, that 6 bottles). On a car, that is 4 bottles. More than they say you need, but that is my experience.b. It is OK at remedying Catalytic converter problems. (e.g. P0420 code signifies "Catalyst System Efficiency Below Threshold (Bank 1), or the similar P0421 (for Bank2). These codes fire when your catalytic converter is not working. Whether Techron can help fix that or not depends on your vehicle's situation, and how long its been having an issue. The short version, if its been a long time (months and months, or years), this product is unlikely to solve your problems. That is because not only did the vehicle throw the catalytic convert code, but you ignored it a long time. Which typically means that you Catalytic converter has been getting over-temped for a long time, and you have likely melted a good chunk of the internal honeycomb structure as a result. No magic gas tank chemical is going to fix that. But if your vehicle "just' threw the code, this stuff might work. A LOT of the time on older cars, the issue(s) are that you have older rings on your cylinders and they are leaking more oil to the PCV system, and then back into the air intake. That is really dirty oily air, being "reburned" at the demand of Air Quality standards people, to keep the atomosphere cleaner. But its putting tons of oily dirty air through your cylinders and then catalytic converter. That oil doesn't all burn in the cylinder, and so it flows to the Catalytic converter, where it does 1 of two things. It either burns, and coats your platinum coated honeycomb with carbon deposits, or it is not all burned, and it coats it with carbon deposits and "wet oil" residue. This Techron seems to be very good at cleaning up both of those issues.I have old cars, and both (now) use oil catch cans, installed between the PCV valve on the engine, and the air intake's auxillary "SMOG" recycle input orifice. (There is a rubber or metal tube line that runs from the PCV valve to the air intake. An oil catch can is a great idea to catch and cleanup a lot of this oil in that air before it makes it to your engine.This Techron is the other end of the problem. In the gas, it helps clean up the carbon and oil residue in the Catalytic converter (and on your cylinder heads and piston tops), getting rid of knocks (the later), and Cat codes (the former).But as I said. If your Catalytic converter is too far gone, nothing will help it. But spending $100 on 4-6 bottles of this Techron is often worth the effort to "heal" your Cat enough to pass a test. Long term, an oil catch can, and different driving patterns, and checking your spark plugs and ignition coils is worth while. Mis-gaped spark plugs (they wear over time) and aging and imperfect coils can also cause the same problems. Unburned gasoline (instead of oil) that clogs up the Cat.I have fixed my Cat twice now with this stuff. (Each brought on by long drives, over mountain pass freeways (4500 ft., and 4000 ft. (from sea level) charging up the mountain at sustained engine loading. That tends to make old engines just "crap" oil into the air intake (via rings, PVC, intake-second burn) and clog up your Cat. Put some of this stuff in right away, and it can often be reverse without the Cat having gotten SO hot, that it melted the honeycomb, or SO clogged (if not melted), that no chemical is going to succeed to getting the blockage cleaned out.All PEA is good, and this has the most.

I was recommended this fuel cleaner after using AI looking for a way to restore acceleration.The product definitely moves carbon buildup around the engine and sometimes two other components that can get clogged. AI also assisted me in the steps to clean the throttle body after I was experiencing sudden acceleration issues a month after using this product.That carbon don’t disappear, it just moves down the line to the next component. I ordered a 6pk and I’ll be using it more often to prevent more carbon deposit issues.

I was told to use these one every oil change on my new Kia 2022 K5 and my engine literally every time I put this bottle in runs like new again and it maintains it throughout the 3,000 miles if not longer knock on wood so far the stuff is really amazing. Huge advantage of the line especially with engines with GDI that have direct injection of fuel. Especially good on turbos and superchargers this stuff really works amazed I've been using it for years I just had time now to do a little small review but it is really good stuff

We buy new vehicles and useful rural homeowner equipment, maintain all rigorously and, keep virtually all stuff a long time. If we can’t fix things ourselves, we use trusted local shops. We use “Top Tier” gas since 2012, OEM filters, relays, etc. sourced from dealers who participate in OEM Manufacturers’ consumer sales programs and, we use Mobil 1 oil exclusively (since 1977) in everything (except Pioneer 1000-Honda oil & filters).We have never had any gasoline engine problems- cars, trucks, Kohler v-twin Sears garden tractor (1998), high wheel push weedwacker (~1995), Honda generators (2013), push type Sears B&S engine lawnmower (1980’s), etc.Top Tier gas has the exact same additive formulation as “TECHRON” as recommended by top reliability (and moderate) OEM vehicular makers. We were not aware that this Techron product was available until a few weeks ago and we snapped one up to try . Sometimes we must get non-Top Tier fuel under various circumstances and we started to use this product in “other” gas for small yard use equipment. In particular, our Pioneer 1000 w/ fuel injection took to Techron extremely well.Over many years, it has never failed to start, but took more cranking as the years rolled by (if going from ~1-1/4 seconds to 2-1/2+/- is significant). Now with this additive it starts right up like new.

My go-to system cleaner in my 21 ridgeline... use it every 6 months... cuz I only put two to three thousand miles on my truck and it keeps my system clean

The best gasoline additive on the market. Already in all Texaco and Chevron gasolines. Keeps injectors clean, smooths out engine idle and extends engine life….great stuff!!

My 08 Dodge Magnum v6 was running rough at idle but at take off ran good. Tried several name brand fuel cleaners with no results. Tried Techron and it smoothed out the engine at idle completely! Amazing product!

i add at every oil change to keep injectors and valves clean, helps with MPG and longevity