I find myself sitting in traffic all the time, which of course is pretty normal in Los Angeles. When someone slams on their brakes and lock up their tires they create a tiny puff of smoke. Most people hate the smell so they roll up their windows. As soon as it comes across my nose...
When your battery is full the system does engine braking to save the brakes on a steep downhill. During this time the ignition and fuel is off. The engine then becomes a vacuum pump of sorts allowing oil to get past the bad rings and accumulate in the cylinder. At the bottom your engi...