this is my 1.6 HDi Peugeot Partner 2007 roughly about 106 000 miles
you always hear about these diesel injector cleaners diesel fuel system cleaners and so on
but do they really work do they clean your injectors are your injectors clean after you've poured
this liquid in your fuel tank previously i tried bg245 you can see the video here but this didn't
really work at all next i tried the Wynn's diesel injector cleaner you can see the video here and
this really worked the injectors were relatively cleaner after this Wynn's diesel injector cleaner
roughly about seven percent you can view all the stats in that video but at the time i really put
37 liters of diesel in the tank that's the Wynn's injector cleaner but they say that you have to put
minimum of 20 liters of diesel and i put 37 almost twice as that so i really thought this time around
can i do better if i put 20 liters instead of last time around 37 liters this is the
bottle that i'm going to be using the Wynn's diesel injector cleaner basically it says
i mean what does it contain it's not entirely clear there's some c8c26 there's some sort of
a carbon chains probably contain some cleaners that dissolve these particles in the injectors
and the direction of use you add one bottle of this 325 milliliter to a minimum of 20 liters of
diesel so how does it work first you drive along exhaust your tank the diesel in the tank to be as
little as possible then you pour the Wynn's diesel injector cleaner on in the empty tank top up with
20 liters of fuel so there should be there will probably be one or two liters in your tank because
you don't really go on empty top it up with 20 and then drive along your usual business a lot
more stops and goes rather than one single journey on the motorway so there is time for whatever the
liquid is in there to sit around the injectors and clean them when you drive alone they get
blasted through burnt and so on so how am i going to do this i'm going to be using the injector leak off
test and this is not the best test it's not the most scientific test but it's the easiest that i
can do and i can do it multiple times and kind of get the average and so on and i can compare from
one to the other if you want to see the whole how i'm doing it there is a video here how you can
perform this injector leakoff test so first of all before pouring the Wynn's diesel injector cleaner
i'll do a test of each of the four injectors three times to get the average measurement to get
kind of a sense of the variability between the injectors then i'll pour the Wynn's diesel injector
cleaner with a 20 liters of diesel fuel then i'll drive along my usual business then once i've
exhausted these 20 liters with the Wynn's then i'll do another three tests for each injector
so 12 tests on my car and then of course i'll compare how these compare with the pre and after
the treatment with the diesel injectors in order to inject the leak off test i'll be using this kit
it's fairly simple and all the components that i'll be using are in the description of the video
if you want to check them out basically it's got a lot of these tubes to collect the diesel
that that is returned a lot of silicone tubes something to hang it off and so on and crucially
these are the end bits that you put on your injectors for my car for the 1.6 hdi this is the
0.1 and one single modification that i've done to this kit is to drill very small hole probably
hopefully you can see it a very small hole there so when the diesel comes inside
it can displace the air outside or not to create a vacuum but that's about it that's the kit
so how does it work the idea of this leak off test so you remove these the leak of pipes from here
from all the four injectors then the whole system the fuel system is under pressure from the high
pressure pump all the fuel is under pressure and then the injectors pulse and release a bit of
fuel in the injectors so when the injector is slightly clogged under this constant pressure
there is a lot more fuel being returned if it's slightly blocked this is really open
and it just lets a lot of fuel inside of the cylinders there is very little returned
so the idea is that i'll measure this before pouring the Wynn's diesel injector cleaner
get an average for each injector because they will be slightly different and then when i measure it
again after the treatment with the Wynn's diesel injector cleaner these should return slightly less
so in other words it's cleaned the injectors a bit more and that's it all the this testing will be
done on a speed mode because nobody wants to see me doing this for two hours so first is
to take a measurement of before putting the Wynn's diesel injector cleaner enjoy
you
so the first measurement is done before pouring the Wynn's diesel injector cleaner
and this is my car's instrument cluster just after doing the injector leak off measurement
and this is my fuel tank and it is almost to zero i really do not want to go to zero because
it is picking up dirt from the bottom of the fuel tank so do not really get to the bottom where the
fuel light is on and there is roughly about at least the car's computer says 148 kilometers
until the tank is fully empty or at least i need to pour more fuel in and the milleage of my car is
105 621 miles and now is the time to go and pour the Wynn's diesel injector cleaner and of course
fill up the car with 20 liters of diesel here is me pouring the Wynn's diesel injector cleaner
it's actually pretty easy as it has a quite long and thin neck so it could be poured quite easy
of course i'm trying to extract the last few drops of liquid from the bottle like it matters like it
will make a difference of course pouring some fuel in and it should be exactly 20 liters of diesel
and here it is exactly 20 liters of diesel fuel on top of the Wynn's diesel injector cleaner i filled
up at the texaco petrol station it's closer to home the price of diesel of course is on the low
side of things, next is to run the car with my usual journeys and lots of stops and goes so to
give a chance of the Wynn's diesel injector cleaner to clean these injectors in my 1.6 hdi engine
so i did my usual journey with the car the car is nearly on empty if you see on the left the tank
the light is on so it means that it's nearly on empty i managed to cover roughly about 240 miles
using these 20 liters of diesel and the car mileage currently is 105 862 miles and
of course the computer says that i only have 118 kilometers till tank is empty or i need to fill up
in order to travel before it was 148 kilometers till the tank was empty this time it's 118
kilometers so i managed to eke it a bit more to be too close to the bottom and of course this is a
shot of me filling up after i've managed to run it low i managed to fill up 59 liters and my tank
is 60 liters so i only had roughly about one liter of the tank so i could get it as close as i could
this is the closest i could get it probably i could get it to 500 milliliters but that's pretty
close running to to the dirt at the bottom of the tank next thing is to do the second leak off test
and i'm not gonna really show it i'll just show a video here where I'm starting doing it so i did
the same test three times measurement of the leak off of each injector and recording those so i'm
not really gonna show this the next thing is just to show how the results are showing the before
the Wynn's need to inject the cleaner what is the return and how clean are the injectors after doing
this 240 miles with the diesel injected cleaner hopefully you've watched the whole video so far
and if you enjoyed it as much as i enjoyed making it so here are the results does this really work
the Wynn's diesel injector cleaner with 20 liters of diesel and this is just to bear in mind this
is my second time trying the Wynn's diesel injector cleaner the first time i used 37 liters of diesel
and this time i'm using 20 liters of diesel this is the R programming language is just
easier to visualize and this is on on the right graph on the graph here you can see so this is
the Wynn's diesel injector my second time testing so this is before measuring the second time this
is the baseline test on the y-axis you can see milliliters of diesel fuel return for my test is
three minutes and here on the x-axis is the first one is injector four this is injected three from
left to right then injected two and then injector 1. so these boxes represent this thick black line
represents the medium and these are the two i only have three measurements so these the two
outside measurements so the extreme measurements so what you can see these injector number four
injector number two roughly about the same 33 milliliters of diesel returned injector number
one is slightly returning more 30 let's say 38 milliliters but injector number three is quite
different than the other three it's kind of on the blocked side slightly and has returned roughly about
i don't know 48 milliliters so now if i plot the after traveling roughly about 240 miles with the
Wynn's diesel injector cleaner and here are the results so this is for injector 4 before and after
injector 3 before and after and what you can see in most of the time so actually in all the time
slightly above so in other words it didn't really clean the injectors in my 1.6 hdi engine
there could be several reasons for that so for example it could be some error in my measurements
of course but the other thing is i could have reached some maximum of cleaning that it could
be done so let's i have here a small linear mixed effects model that i can run and down here at
the bottom left you can see the p-value for the difference between the before and after in order
for injectors is 0.02 in other words there is a statistically significant difference before and
after in other words has increased significantly slightly it's not too significant but it has
increased a bit in other words it hasn't really cleaned them before pouring the Wynn's diesel
injector cleaner one other thing i would like to plot here is because i have two measurements
with the some time before if you browse my video sometime before i have with the 37 liters
topped up the Wynn's and this second time with 20 liters of diesel so this is the current results
before and after injected four before and after injector three so this slight increase
in all of them like it hasn't cleaned them so this is with the 20 liters the second time around with
the diesel the Wynn's diesel injector cleaner so if i plot the first time i run when i did that
so here this blue line represents so this is all for injector four this is injector three so this
is the first time i did the Wynn's diesel injector cleaner and this is the second time so what you
can see it actually cleaned them all right they returned a lot less so for the injector number
four it's a lot less for injecgor number three it's a lot less the first time around i did the
Wynn's diesel injector cleaning that's for all is the same so if you look then i measured this again
after some time i probably spent about six months between these two measurements so it's roughly
about the same here is slightly lower uh but not too lower here it's about the same here is
slightly only slightly lower so if you look after the Wynn's diesel injector cleaner here is slightly
higher than after i treated it the first time around with the 20 liters here it's about the same
hasn't really kind of kept it on the same line here is slightly higher in here is a bit higher so
what i'm trying to show with this is that i mean it hasn't really increased that substantially when
you look at only with this graph it has increased slightly but kind of maybe i'm
looking to find something some positive in this maybe it has kept it not to increase that much
and what i have here another graph so on the x-axis is days because i've done this
this is so the blue line represents injector number one and the black line represents injector
number three this one that is really blocked these first two dots here represent before
and after and this is bg245 treatment i had and it didn't really work i mean it was returning a lot
more and this was also returning a lot more after i treated with bg-245 these two are the first
time i tried the Wynn's diesel injector cleaner and you can see it's a substantial decrease
of fuel returned in other words it really cleaned the injectors same with injector number one so this is
injector number four this is injector number one then it passed some time uh probably about six
months i don't know this is this these are days so zero is i think december 2019 and this is now
april 2022 so there is a quite a number of days here it my injector kind of got continuously
blocked with time i mean it's not really that much this is 14 this is probably 42 but with time
they started to get more and more blocked then i treated them with Wynn's the first time and they
got unblocked and this is the second time this is the before the second Wynn's treatment so this dot
is the baseline and it's slightly below that one that was also slightly below the after the first
Wynn's let's say and this is slightly higher and as i showed with the previous graphs but this is not
too different than an after so they haven't really increased that much in here it's just
below that they also kind of this injector number one is about the same when i treated it with this
number of times so if this is let's say uh uh 30 days um probably 40 days until day 550
they increased quite substantially then the Wynn's the first time i treated them with the it brought
them back to the kind of original state that they were here it hasn't really dropped them even more
and that's what i'm trying to really show with this graph i mean probably i've achieved the
maximum that i can clean these diesel injectors with some chemicals if i take them out and send
them to the company to clean them they'll probably be a lot less than that one last thing i measured
with this Wynn's second time with the the Wynn's diesel injector cleaner i measured the
pressure the high pressure pump how many bars it produces and there isn't much difference between
before treating them second time and after also i checked the return of the injectors
the correction values and there wasn't much of a difference also there but this is it hopefully
you've enjoyed that video i mean second time around with 20 liters it didn't really work out
that well it worked the first time around it was on average seven percent cleaning of the injectors
second time around it didn't really do anything maybe it stopped them getting more blocked but it
didn't really improve it so one time would be good enough maybe i could try it in other ones but what
i'm thinking the next time the next video will be liqui molly and to see if that would actually
clean them even more than the Wynn's diesel injector cleaner so thank you very much indeed for
watching hopefully you enjoyed that let me know for any comments in the in the comment section