we have a guy down here with a highly modded one that is in Tesco's all the time

everytime he parks and walks away the car is always still running, people run after him shouting he has left his engine on
but his alarm system is set to close all windows, lock doors and switch off the engine when it has reached tempture!!!
he says that so short a drive to shops that the car does not reach full temp and if you switch off and try to restart this will blow the lump probally what kwik-fit done and drokked it!!!!