Thanks for the replies and I should have described the symptoms better.
The car will actually start and run properly at idle and low power conditions only; there are no bubbles in the lines at this point. As soon as you get into the throttle and put a load on the engine it starts surging / cavitating whatever; now it's like it's starving for fuel and here is where I observed the bubbles in the clear lines from ip to fuel filter.
The wvo source has over the years been mostly soybean oil but sometimes they used canola, olive and others and I've never had a problem until now. She claims there is nothing changed or new in their process, but I gotta wonder if there's not something else that got in some of it (like a cleaning chemical or something like that). The wvo still looks fantastic, clear no sludge, I just can't use it right now.