This techron thing is DIY

I suggest you do the Liqui moly jetclean tronic system in authorized workshop and the results even better

i believe it also able to clean the fuel tank with that cool pump machine. Did not tried on mine but my friend did it.

Because it is dangerous to DIY that techron in my opinion because the tank must be almost used up to have better result as stated on the bottle. Otherwise it is pointless

" To use, pour the entire bottle of TCP into a nearly empty fuel tank and refuel with up to 45 litres of petrol "

Trust me you do not want to risk going nearly empty fuel tank just for this, its very risky later will also cause all kinds of high temperature results or fuel tank too dry etc.

Really want to do it , ask a experienced user/workshop.

Any improvements since you used 8 bottles ?

Someone need to do full real review on this. Since it is so popular