Fan and cooling system are in 100% working conditions, I made sure of that long ago. I found something in Germany too, from Liqui Moly, but that'a just an additive and I don't buy any additive stories anymore, I would be buying the comma flush out since I've read good reviews about it. So is it ok to leave the engine running for an hour at 1200-1500 rpm with only half the capacity of what it normally holds? I am only asking for certainty, I don't want to make more bad than good, and I know there's the risk that the seals might start leaking as the gunk that covers them and keeps the seals practically sealed will not be there to act as a second barrier anymore. But if that won't happen in my case, will the Comma product reach the lifters too and clean them? Read somewhere on the forum that flushing oils are too thick or something like that and they won't help with the lifters
