IF YOUR EVO HAS A TRE REAR COVER WITH THE OIL SIGHT GLASS YOU WANT TO FILL IT NO HIGHER THAN 1/2 WAY.
96-07 EVO: Mitsubishi recommends that the rear axle that is found in the EVOLUTION be filled with their factory oil, Diaqueen LSD Gear Oil part# MZ320345 or a high quality GL-5 or higher 90w Hypoid LSD gear oil. These oils contain a friction modifier that will reduce noise associated with friction disc type limited slips.
REDLINE 80W-140 GL-5 GEAR OIL We recommend using Redline 80W140 GL-5 Gear Oil. Their part number is # 58104. For road racing applications, use Redline 80w-140.
REDLINE SHOCKPROOF HEAVY If the vehicle is going to be drag raced Redline Shockproof Heavy is an excellent oil for the rear axle but outside temps should be 45*F or warmer because the oil is not thin enough for cold weather use.
OIL VISCOSITY INDEX CHART