Am I correct that VTEC and VVTI engines change their "configuration" by high RPM and high oil pressure? If yes, are these engines very picky on what motor oil to use?
Have you heard of horror stories wherein VTEC and or VVTI engines malfunction due to wrong motor oil used?
Whether is fully-synthetic or semi-synthetic, as long as you put in the motor oil with the correct rating as stated in your owners handbook, then you will not have a problem.