idle stop and go

trlauto.com the makers of the auto stop eliminator is looking for someone in Fairmont, West Virginia to loan them their car for 8 hours and they will pay you $300.00 so they can use the car to make the Autostop eliminator. You can wait there for the 8 hours. Just tell them Danny sent you. You...

If the purpose of the Idle Stop and Go (ISG) function is to save fuel, why then does the engine restart when I shift from D (Drive) to P (Park) (i.e. upon reaching my destination and wishing to shut down the engine entirely)? Is there a more efficient way to park the car?