Two reasons that I can think of. 1) Engines like to have a certain operating temperature. Especially computerized vehicles. The thermostat in the closed position will keep the coolant contained within the block itself to not only speed up the warming process, it will also maintain that operating temperature by opening, and closing as needed. The onboard computer in today's cars depend on the engine temp. to regulate other systems such as fuel (air/fuel ratio), timing, idle speed, etc. 2) HEAT....the heater for the car utilizes a mini radiator called a heater core. It is connected to the engine cooling system. The quicker your engine can warm up, the quicker your heater will too. Until then it will only blow cold air.
Engines are designed to operate at a given temperature, without a thermostat the engine will often not get up to the designated temperature. So it needs a thermostat to be sure that the engine will run at its optimum design rating.
Yes
Any featherbed will work well in colder climates.
colder
nnh
Yes, because they have thick fur and are built for colder climates.
My OEM thermostat is labeled 85 (Celsius), which is 185 degrees F. This car was originally purchased in Arizona. Now I see everywhere on discussion forums and such that the OEM temperature is 195 F (that is a little below the mid scale on an unmodified gauge). It won't harm the vehicle to run hotter, especially in colder climates, gas mileage will improve somewhat, but performance will worsen.
Because the higher you get the colder it gets.
The uneven heating of the Earth is one of the reasons why biomes with colder climates are located at the more northern and southern parts of the globe.
It all depends on where the lake is located at. Lakes in colder climates will have a colder normal temperature than that of lakes in warmer climates.
5W-30 in colder climates, 10W-30 in warmer climates.
hotter climates. in colder climates it tended to die out quickly, and spread less.