Question

why is it adviseable that vehicle engines are turned off when they are not in use for more than 2-3 minutes.
BOSEM X​

Answer 1

simple turn of your key can keep the air cleaner and save money and fuel. Every time you turn off your car engine in place of idling, you'll: Make the air healthier by cutting down on hazardous pollution in your town or community. Idling tailpipes spew out the same pollutants as moving cars.