Owners often use for standard operations, though 5W30 may be preferred in extremely cold climates to prevent sluggish starts.
The MT series, including the 2801D, was produced primarily in the late 1970s through the mid-1980s. Mitsubishi Mt2801d
40-year-old Japanese wiring harnesses become brittle. Ground wires corrode, causing the Easy Checker lights to do weird things. Solution: Clean every ground connection and apply dielectric grease. Owners often use for standard operations, though 5W30