Can Wynn's diesel injector cleaner do better with higher concentration (1.6HDi)

Wynn's cleaned the injectors in my 1.6HDi first time, but I put 37L of diesel fuel. This time I am doing a double dose of 20L of diesel. Will it work better?
This is a test of the Wynn's fuel system/injector cleaner in a turbo diesel 1.6HDi Peugeot Partner (2007; 90bhp; 66kW; 9HXC engine; ~106,000 miles or ~171,000 km), same as a Citroen Berlingo.
The tests comprises reading 3 times the leak-off of the injectors in the Peugeot Partner when the fuel tank was nearly empty before pouring the Wynn's diesel injector cleaner. The car was also warmed, so not to affect the readings. These 3 tests for each injector were done in a quick succession. Overall it takes me ~1.5h to do the 3 measurements for the 4 injectors. The Wynn's diesel injector cleaner was then added to the nearly empty fuel tank and filled with normal diesel (Texaco). I drove 240 miles with the Wynn's diesel injector cleaner, mainly shorter journeys (~70%) but also some motorway/highway as well (~30%) for about 2 months, so lots of stops and goes and sometimes the car stood not drive for a few days (due to the pandemic). The fuel tank was again nearly empty and I did the same 3 measurements of the fuel returned by the injectors. The idea is that if an injector is blocked it will return a lot of fuel back as compared to a normal (non-blocked) injector. Fuel is under pressure and a blocked injector will result in slightly more fuel returning than going through the injector. It is not entirely scientific method and it is a bit crude and there could be a lot of variability. Nevertheless, it is fairly OK and I can easily perform it.
The video also shows how to perform a leak-off test or measure the return flow of the diesel from the injectors. Overall, one has to look for the variance between the injectors rather than some arbitrary constant return flow. There are some websites where it is stipulated that if the injectors are good if they return less than 25ml per min. I am not too sure about these values. After the test all of my injectors return less than 25ml per min. So, there might be some merit in this less than 25ml per min at idle.
This time around with 20L of diesel on top of the Wynn's diesel injector cleaner, it did not clean the injectors at all. It is possible that I have reached the maximum these injectors can be cleaned with chemicals.
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Wynn's diesel injector cleaner 325ml:
amazon (UK) amzn.to/2VdRfsS or ebay: ebay.us/gC59KE
Wynn's diesel injector cleaner 3x325ml (amazon UK): amzn.to/3Chrgl4 or ebay: ebay.us/FbKZhD
Fuel Flow Meter Leak Off Tester Kit (amazon UK): amzn.to/3rZ1mOL or ebay: ebay.us/uEkQwJ
BG 245 Diesel Cleaner 325ml (amazon UK): amzn.to/3b830ms or ebay: ebay.us/BRuPNy
Leak Off Fuel Pipe (amazon UK): amzn.to/3qQprrp or ebay: ebay.us/CCRda7
My previous test with the Wynn's diesel injector cleaner ( • Wynn's diesel injector... )
How to perform leak-off injector test ( • How to test injectors ... )
My previous test with the BG245 cleaner ( • Will BG245 clean the i... )
#HDi #InjectorCleaning #Wynns
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