Unless there is something fundamentally wrong with your engine or your clutch control, this makes no difference at all
You will use more fuel manoeuvring in reverse when the engine is cold at the start of a journey, than when it's warm at the end.
Unless there is something fundamentally wrong with your engine or your clutch control, this makes no difference at all
Shopping: Drive in, so I can easily put things in the boot on my return.
Work: Reverse in, so I can just drive straight out and get home faster!!

You will use more fuel manoeuvring in reverse when the engine is cold at the start of a journey, than when it's warm at the end.