The 2000 Subaru Impreza comes with two different engine options; You may have the 2.2L 4Cylinder (EJ222) or the slightly larger 2.5L 4Cylinder (EJ251). Regardless, in either engine, You'll use 4.2 quarts of SAE 5W-30 full synthetic motor oil. In its absence, it's possible to substitute SAE 5W-40 over the short term, but it's typically not recommended. That's because the higher an oil's weight, the thicker it is. Using thicker oils introduces friction into the system, which can prematurely wear and tear the engine, leading to an early failure. Therefore, You should use the manufacturer's recommended oil with the lowest weight, even if it costs a bit more per change -- You'll thank Yourself in the long term.
John A.
January 2, 2020
Both engine options in the 2000 Subaru Impreza the 2.2L box-4 engine option and the 2.5L box-4 engine option require 4.2 quarts of 5W30 (preferred). Subaru recommends different viscosities based on local weather conditions and operational use: 5W30 (below 104 F) 10W30 or 10W40 (above -4 F) and 30 weight, 40 weight, 20W40, or 20W50 (above 95 F and heavy duty operation).
Edgar
September 14, 2020
What is the motor oil of a 2000 Subaru Impreza outback sport?
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