Chevron 67740-CASE Techron Concentrate Plus Fuel System Cleaner - 12 oz. (Pack of 6)

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.

Use it in 2000 Corvette with AA Supercharger. Keeps my injectors clean and keeps my fuel gauge working.My cost was $10/large bottle vs $17 locally.

I’ve been using the Chevron Techron Concentrate Plus Fuel System Cleaner for a while now, and I’m honestly impressed! My car was starting to have rough idling and sluggish acceleration, but after using this cleaner, it runs like new. The fuel system cleaner helps clean the injectors, combustion chambers, and intake valves, which noticeably improved my engine’s performance. It’s easy to use, just pour it into the gas tank, and you’re good to go. I’ve noticed smoother driving and even a slight improvement in fuel efficiency. Highly recommend this for anyone looking to boost their engine’s health!

When the Jeep dealership tried to convince me I needed a fuel system cleaning to the tune of hundreds of dollars I thought I'd give Chevron Techron Concentrate Plus Fuel System Cleaner a try. I bought two and used them on two subsequent tanks of gas (with a nearly empty tank before adding new gasoline), upgrading the grade of gasoline used when I did so in my 2017 Jeep Cherokee.Initially, I noticed a bit more pep and less hesitancy. with the first batch. My mileage in town did not change, but on the freeway, I gained a couple of miles per gallon after using this product. The second bottle maintained what the first had accomplished, and my in-town mileage improved slightly too. Acceleration starts, and general performance seemed better after the second round.I'm now on my third tank which doesn't have the cleaner in it. I've noticed no difference in performance, but recently took a road trip where acceleration was smooth and there was no pushing the button to start the car and having it die, which prior to the use of this product had been an issue.I think this stuff does do something to clean up the fuel, but repetitive use may be needed to maintain the vehicle's performance. How frequent? I suspect that would depend upon the age of your vehicle and the gasoline's quality, and only one of those things is under your control.While not magical, definitely worth giving it a try if your vehicle is stalling, showing signs of lack of engagement when the accelerator is depressed, or generally sluggish.

Great for cleaning up injectors need to use every 10k

Not sure but after I put it in a drove 4 miles to work then I left work to drive home. The sluggishness is gone. The rough idle is gone. My suv drives much better.. not BS’n. This stuff rocks.. not sure how long it last in the engine but it is worth the money.

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 bought this after a friend advised me to use it and it really worked. I'm no expert mechanic but I was able to see the engine becoming less noisy and there was a still improvement in the mpg.Used it in a rogue and elantra, and it worked like a charm.I later suggested this product to another friend who had a relatively new Palisade and he too impressed and had similar experience as mine.I'm certainly going to use this regularly with the hope to maintain my cars better with fewer visits to a mechanic