-40 is less then -20 so -40c is colder then -20c.
Nope... -20 is colder.
No, -19 degrees is not colder than -20 degrees.
18 degrees Celsius is colder than 20 degrees Celsius.
17 degree celsius is colder.
20 degrees Celsius is colder
25
20 C is colder.
20 degrees Fahrenheit is colder.
0
20 degrees Fahrenheit = -6.67 degrees Celsius therefore 200F is colder
-30
Twenty below (-20) is colder than ten below (-10).
-40 is less then -20 so -40c is colder then -20c.
Nope... -20 is colder.
Normally 10W-30 is recommended, but in colder climates 5W-20 is sufficient.
Normally 10W-30, or if used in really colder climates - 5W-20.