Since VTEC physically changes the way the engine breathes, low to moderate oil burn off is expected. If it doesn't burn a drop, great. But the engine is no worse off if it burns some. Now, if you have plumes of smoke billowing out, I'd say you've got a problem. Honda may have refined the oil consumption on newer models, but any time you alter the engine's internal fuel and air flow, the change can definitely affect the path of the oil.