yeah. vtec fluid levels have been known to be the main cause of a car not starting properly or stalling or dying in the middle of the drive. it's one of the downsides of owning a Honda with a VTEC engine, you need to change one more fluid. but it's worth it. from what i hear, VTEC is Honda's patented turbocharger, unlike turbos that use regular motor oil, VTEC uses VTEC fluid.
the V6 uses 20W10 and the I4 usually uses 10W60