I have recently changed my CX-5 to a petrol model. It is my first Petrol vehicle in about 25 years. The first change I noticed was that on first starting up, it revs to about 1400rpm for at least a minute and it does this every time even after a few hours idle and in warm weather. Is this (a)normal and (b) if it is, is it safe to engage drive while revving at this speed.