Weren’t you gonna contact the tuners and ask?
I did get a hold of Mitch, and yes, he did claim to have
heard of this as well.
But, he also said that
if he was still tuning, he would NOT refuse to tune someone's car with V-Power in their tank, or even if they had to run that fuel consistently, but would 'tune around' whatever 'problems' those additives might cause.
That
might end up with a tune which is not on 'the bleeding edge' as you say, but then I would never ever want that anyway, for myself, whether still on the factory slug, or on a useless hairdryer with more displacement than our engines have in their cylinders (
regardless of; full racing fuel octane, ethanol content, whatever auxiliary fueling, Guardian Angels, meth injection, etc., etc.).
Jason (Dizzy) has not yet answered my email, nor have they picked up the phone so that I could ask about this contentious topic.