Yes, but they don't fix broken shit.

>>28909046
Not to a significant enough degree that it makes up for the cost of the can, at least not unless you're constantly adding it for the next 10 to 20 fill ups. If you want something that *does* make a notable difference in one shot, then you'd need to get a shop to flush your car with TerraClean or something similar. Very potent stuff.

https://www.youtube.com/watch?v=wiViPKIoG68

>>28909046
>injectors and shit
yo dawg. please inject your bbc into my white wife.

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>>28909046
just use the good gas and your shit will be squeaky clean

>>28909046
I've cleaned injectors with the fuel additives before.
Works ok
Not as good as saying having a injector shop flow bench and clean injectors.

>>28909046
Only ones with high levels of PEA. Redline or Techron.

>>28909046
Techron concentrate works the best but youre supposed to run that stuff a tank or two before your oil change.
Shell's 91/93 for 4 or 5 tanks every year does much the same.

>>28909104
>>28909173
This. Anything with a higher percentage of PEA like Techron or Redline is about as good as you can get from a bottle. The idea is to clean up the injectors and the combustion chamber a bit. It’s not going to fix failing injectors or broken shit but it doesn’t hurt to run it through a tank once per oil change interval. Using top tier gas will also help if you can do so consistently.

>>28909046
Only if you have your fuel filter serviced.

>>28909046
I saw a youtube video over 10 years ago where injector cleaner gave back a significant amount of power in an "old" car. They dyno tested a porsche 944 I think

>>28909046
In my experience yeah stuff looks cleaner, idk if that helps with anything tho.

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>>28909046
Yes, I use the same product every year
pic rel is the intake valve after 272.000 km on a 2005 1.6 VW Jetta.

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the clean parts are where the fuel and the cleaner meets the surface, everywhere else it's gunked af
the internal parts of the injectors are just as clean as the valves

>>28909046
Not really, just maintain your car the best you can when it comes to oil and keeping clean air filter in all the time, that'll make it run better than any snake oil shit you can dump in it.

>>28909068
Motul and Liqui stuff will flush out gunks, but it needs time to break down the crap. I've managed to clog an injector on a prius because the cleaner dissolved the contamination, but the mesh was too fine for it to pass trough. So anon needs to be careful with fuel system cleaners.

Cooling system cleaners can also do wonders.

t. certified technician

I only use these things when acquiring a new vehicle or if something has sat for a significant amount of time.

Usually put a heavy concentration of PEA into 1/4 a tank of gas, and then get one of those $5 bottles of oil flush, a $10 jug of cheap new oil, and then $25 jug of the synthetic oil I want to use, along with cheap then desired filter. I change the oil with the cheap oil and drive it around for half an hour with the oil flush additive in (diesel?), then change the oil again with the stuff I want to use. Outside of doing this, in a vehicle that drives fine that always has fresh gas going through it, it's kind of pointless to ever buy a bottle of that shit.

I am of the opinion that all fuel additives are bullshit. You add it to the tank and it's like 2 parts per million of the detergent or whatever. Even if you soaked your valves in pure heated detergent I doubt it would do much.
Some of them will ruin your cat supposedly.
A few drops of MMT isn't going to make your gas 110 octane, fuel injector cleaner won't do jack shit, and any other "engine cleaner" is total bull except seafoam through the intake vacuum and that's questionable itself.
If you have water in your fuel, maybe fix the cause instead of adding an expensive band aid.

>>28911719
Our parents cleaned parts with gasoline....

>>28911566
>>28911568
I had a 2001 Corolla that ran cheap 87oct gas with zero fuel cleaners ever.
Valves looked exactly like that.

Normal injection just does that on its own

>>28909046
yes and no.
they often work by adding alcohol and isopropanol, both are water mixable. so they clear out water and dirt in your fuel system. modern fuel is already alcohol mixed so why bother?
for diesel, the lowest grade is usually the best burning. offroad diesel stores for years, nato grade diesel, f34 or whatever they call it, it stores for decades but it makes your rig run like crap. most diesel injector cleaners is just crap they dont work.

>>28912035
>t. my sons