I've searched, read and even used v-power NGK plugs before but I honestly don't hear about G-power any. There'll slightly more and are platinum tipped but are they any better than the v's. I know the car recommend the V-power plugs but are G-power any better in smoothness or horsepower. I usually change mine every 25k miles or so and they're cheap so I'm not worried about iridium plugs and of the long life.