I dunno how you drive your Perdana, but the Campro CVT does not require the throttle to be press too deep. A light press and you are already on the way. I believe you would tend to press more because the throttle response is laggy, causing you to misunderstood it as not enough throttle

eg. Press throttle -> "VROOOMM" for half a second -> car starts to move. That's where your petrol go.

The Saga CVT is compounded by the fact that from standstill you have to wait for the clutch to close. For example you're holding your footbrake at the traffic light, when it turns green, on an AT car you would straight lift off the brakes and press the throttle; On a CVT, pressing the brakes opens the clutch, similiar to how you would press on the clutch in a manual car if are holding your brakes so that the car don't stall, in a CVT this is automatic. If you straight tekan after lifting off the brakes , the clutch is not closed yet, so you are basically free-revving your engine and burning petrol pointlessly.

The correct way is to lift off the brakes, wait for the car to begin creeping forward, THEN only gently tekan the throttle. It's not as slow as it sounds, you just have to get used to it.

Other than that, when already moving don't constantly keep too much pressure on the throttle. The CVT can happily cruise at 80-90km/h with just small throttle pressure. If need to accelerate, press slightly deeper.

If you don't already realize, driving a CVT is different from driving a AT car. If I drive my sister's Vios as gentle as I drive my FLX, the Vios will gladly roll backwards on a slope.