The study was apparently the largest of its kind, and comprised over 100 car trips, by 17 drivers. Of that number, 14 drivers were smokers, introducing the tobacco smoke in 66 of the trips; 34 ...

If your car is emitting smoke, chances are good it won't pass muster ... or a cracked engine block, which requires a new engine or an engine rebuild. Even a small coolant leak can lower the ...

What is my best option, other than not getting in the car at all with a driver who smokes? Would it be rude for me to politely ask them to refrain from smoking until we reach our destination?