Mobil has always been great at giving the public/consumer tear down videos and showing what they do to test Mobil 1. So yes, I generally believe them. I also believe when any company states X times better than "xyz industry test" otherwise they'd be in trouble.So basically, if Mobil1 or SOPUS or Castrol, makes "testimony" like this about their oil, we are good to go?
And no, I generally don't believe companies that are trying to sell their product at any cost, bcs. well, they are in the business of making money, like all other companies. Hence, we still don't have objective testing results behind this oil. I don't believe Valvoline, same as I don't believe Mobil1 Triple Action (well, in light of R&P, it might become double Triple Action).
If Mobil said Mobil 1 can remove piston deposits, showed some photos and said they did this in their lab I would believe it.
Show me where any of the aforementioned brands specifically stated piston deposits. They don't.