Yeah, I think I'll stick with conventional. check this out though, this is from the Q&A section on Valvoline's SynPower website:
"I heard that synthetic oil is too thin for use in an older car and creates blow-by and burn-off. Is this true?"
"This is only true if the blow-by problem exists prior to using a synthetic engine oil. If you have a leaking or blow-by problem, synthetic oils can make the issue worse, but they do not cause it to happen."
Since these VXs have a blow-by problem, could it possibly cause more oil consumption switching to full synthetic?
Also, a friend of mine suggested switching to a straight 30 weight oil. He said it may slow the consumption. What are your thoughts on this? Any other suggestions on lowering consumption? What are your thoughts on Lucas oil stabilizer??