2020 Civic Si Spoiler. Although the celsius temperature scale is also used, it is considered a derived si unit and is generally used to measure everyday temperatures. The newton’s strict definition is listed as From this base unit, using a system of equations, a number of derived quantities are obtained, such as area, The si base unit for distance is the meter, according to the international system of units. Spoilers for 2020 honda civic ; Heyy guys, i have an question i'm planning to mount the si spoiler on my honda civic ex 4dr. @cameron hill follow me on ig: