That crack will get worse and can drop metal into your engine causing catastrophic engine failure.

Carbon monoxide poisoning is possible but unlikely unless you spend hours stationary in traffic.

Longer interval with full synthetic is fine on a gasoline engine.

Typically I would do an oil sample with the longer interval to make sure you actuslly have the oil life to go that long with your specific driving conditions.

Automatic transmissions do not have clutches. Have you checked the filters and found “clutch material”? Are you sure your problem is transmission related?

A normal and decently maintained vehicle will not be damaged in any way from doing the occasional emergency stop. Your car is designed to stop without destroying itself.

Your brakes will wear a little faster if you did this daily, and the heat from doing it many times in quick succession will heat and wear your brakes very quickly, but that’s it.

Outside of a racetrack you aren’t going to be pushing your brakes to their limit at all, even with an emergency brake situation every day.

Run it for a few minutes to circulate the oil and then let it sit for a few minutes before draining.

The you have the oil drained back into the oil pan and ensure sediment is suspended in the oil.

No, as long as they’re the same size on both sides of the axle you aren’t going to have transmission problems with a larger tire.

You should go down on aspect ratio if you go up in width however, as going to 285/35 from 275/35 will increase overall diameter of the tire and your speedometer will be slightly less accurate.

Technician here, that chart is trash. Use the weight of oil recommend for your car in the owners manual for it’s entire life.

Only reason to change is to accommodate extreme temperatures and that chart is not at all accurate for a reference in that regard.

The short answer is yes, wider tires absolutely decrease stopping distance when all other factors are the same.

The two factors that matter most for braking are grip and weight. Larger tires provide a larger surface area for tire contact. More surface area = more grip.

Larger surface area provides more grip which decreases stopping distance.