Best injector cleaner
 

What fuel injector and intake cleaner you guys use?

My Subaru manual says every 15.000km it needs injector cleaner, but as local dealer doesn't stock it I did a search and found the following.

In USA there are two different kits from Subaru and Toyota (SOA868V9150 & 00289-INDKT) that clean intake, throttle plate and injectors, unfortunately none available in Europe.
There is also available a carbon cleaner SOA868V9165 through Subaru and Toyota that needs a special tool to apply it through an intake vacuum hose.

In Australia there is a top engine cleaner SA459, sprayed directly on intake vacuum hose along with a fuel additive.


Finally in Japan Subaru sells a PEA based (75% poly-ether amine!) injector cleaner K0879Y0010 as fuel additive, which is the strongest available product on the market in it's category, but expensive too!

Interesting, almost all Japanese manufacturers have their own PEA based injector cleaners from the same Nippon factory, as it's the most powerful ingredient in every effective intake/injector/engine cleaning product.

I decided to follow this path but Subaru PEA isn't available outside Japan as it's extremely flammable. Fortunately the HKS DDR 52006-AK003 is the same exact product available from some e-shops.

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https://i.ebayimg.com/images/g/Ze8AA...4M1/s-l300.jpg

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https://cdn.shopify.com/s/files/1/00...g?v=1569459170

https://shop.r10s.jp/taxnerima/cabin...sti2/k8079.jpg

https://www.hks-power.co.jp/en/produ...dr_img_01a.jpg

That's weird how your manual says to use fuel additives! Here in the US, our manuals says not to :(

Chevron Techron is what Porsche recommends on their vehicles.

Fuel quality maybe?
Techron isn't as good as the original Subaru PEA for sure, as my dealer is also Toyota dealer he puts a Toyota injector cleaner every 15.000km in my fuel tank:

https://s3-eu-west-1.amazonaws.com/i...c255ee2541.jpg

I recommend sending your injectors to a place like FIC.

The twins don't require upper engine cleaner, the D-4S port injectors clean the valves.

Unlike the FA20 in the WRX or the EJ25 in the STI.

GO TOYOTA

I know what D4S does for our valves but I don't underestimate Subaru schedule that mentions clearly fuel injector cleaner every 15.000Km, may be the injectors themselves need cleaning not the valves!

What about Seafoam? Haven't heard much about it when it comes to these cars.

It's a boxer, use UEC and subi injector cleaner like subaru use on every other boxer engine with port injection.

That's what I am going to use, Subaru uses the PEA Subaru cleaner in Japan but as I can't find it available in Europe I am going to use HKS DDR which is the same exactly product!

I use Chevron Techron once a year. Plus, D4S port injectors are supposed to take care of cleaning direct injectors.

Red Line SI-1.
Gumout All-in-One.

They are? I always read that they were to clean off the valve stems and back of the valves from developing carbon deposits. The inside of the chamber is no more cleaned from port injectors, as it is cleaned from direct injectors.

https://www.caranddriver.com/news/a1...ect-injection/

If they do clean the DIs then they don't really do them too well. Roughly 50-60k miles on these. At best, they might be cleaning a little, but not the opening, which is what matters.

https://i.imgur.com/5O1pImC.jpg
https://i.imgur.com/6B0kuNx.jpg
https://i.imgur.com/H2aYiv6.jpg
https://i.imgur.com/yWZeMOa.jpg

18k miles on this motor: just to show carbon deposits in the combustion chamber despite PIs and DIs, and to show that the DI injectors are pretty buried.

https://www.revvolution.com/image/al...jpg?layout=980
https://www.revvolution.com/image/al...jpg?layout=980
https://www.revvolution.com/image/al...jpg?layout=980

As I read, D4S is designed to clean direct injectors on idle cycles. Maybe, that engine is not idling enough.
https://www.wardsauto.com/technology...feature-tacoma

our car hot-idles using only DI so i do not understand what they are talking about

What about the Lucas oil fuel treatment. I was using it on my WRX and would get 2mpg more when I was commuting. I thought it was giving a bit more power, so I did a blinded study where my father in law put it in or did not, so I would not know. I was wrong every time, so no increase in power, but the mpg was there. It also turns out that it can lessen the crickets on my BRZ. Never did the mpg with it on my BRZ.

It seems both DI and PI used at low rpm as explained below. Of course, we are talking about the stock tune. All kinds of adjustments go into aftermarket tunes. They can screw up in any way they want.
https://www.youtube.com/watch?v=zc8aUxBZlsU

no i m talking stock tune.
Car is cranking with 100% PI to around 600rpm, then it makes a short stratified squirt with DI to kick rpm higher (cold start begins)
then it switches to 50%/50% but the DI portion is stratified and very retarded
When ecu estabilish it s time to switch from cold start to warm start, it switches back again shortly to 100% PI... to then use only 100% DI at warm idle
That is all hardcoded into tune and no one changes that

i can imagine the PI fuel that can be flushed out directly into exhaust in overlap zones (low rpm for example, but NOT at idle.. there are several overlap zones in stock tune also at higher rpm) from the scavenging effect (and the Direct injectors are right in the mid way to the exit) but that doesnt happen at idle
Nothing happens at idle with PI and there is no valve overlap so whatever that article says, doesn t happen at idle in our car

That’s cool that they are doing that, but it confirms what I said and showed above.

They said it is the next gen D4S system on the new 2GR motors where the injectors have a slit on the side to blow off carbon deposits. Our engines don’t have that.

Youtube "Project Farm"

I recently used GumOut all-in-one in both my and wife's cars. My wife's car's *average* mileage went up by about 1.5 mpg (we did a lot of highway driving, but still, we're talking average mpg).
My BRZ has been running quieter ever since. I can't trace out any other reason. Same gas station, same oil, same me. Only thing different is adding GumOut.

Sent from a potato

When I had my motor replaces at 43K The injectors were badly clogged which leads me to believe that a cleaner additive is necessary.

I used gumout high mileage recently since it has the highest concentration of PEA of their lineup. Easily available and cheap.

PEA is listed on the bottle. The PEA label was on the neck of the bottle of purchased.
https://i.imgur.com/9fJBmVI.jpg

Did any one else notice our engine are 2 stroke?