Nissan Skyline Fluid Recommendations : Engine Oil, Transmission, Coolant, Diff Fluids
The Nissan Skyline GT-R has a number of fluid systems that it uses.
Nissan's recommendations on fluid types for R32/R33/R34
Engine Oil - 7.5 - 30 (10-30 for a street car, 15-50 on a track car) - 4.5 liters
Oil Filter - OEM 15208-60U00 OEM R32 AY100-NS007 K & N HP-2008 MOBIL M1-208 WIX 51361 OEM(R34, smaller filter) 15208-9E000
Cooling System - Approximately 9 liters. Gycol or Water? Depends where you live.
Front Differential (F160) - GL5 85-90 1 liter - (1 quart)
Transmission fluid - Don't try and fill it though the gear shifter. Through the gear shifter is the transfer case . GL4 75-90 4.1 liters (4.3 quarts) in the R32 and R33. The R34 Getrag uses specific fluid 08885-01306 from Toyota.
Transfercase - Nissan Automatic Fluid Type D 1.8 liters (1.9 quarts)
Rear Differential(R200) - LSD GL5 80-90 1.5 liter(1.5 quarts)
There are also two more separate hydraulic systems in the car. The power steering/HICAS, and the ATTESA system.
Power steering/HICAS says to use Nissan Power Steering fluid 0.9 liters
Inorganic Acid Technology or IAT: This is the common green stuff original equipment manufacturers have used for over 70 years. Ethylene glycol is its base chemical and there are silicate and phosphate additives that make it compatible with copper, brass, cast iron and aluminum cooling system components. Manufacturers recommended that you change the green IAT antifreeze every 36,000 miles or three years. IAT coolant was used in GM vehicles until 1994. Chrysler used green IAT fluid until 2001 as did Ford, (with the exception of some 1999 models that used OAT blue coolant which must be purchased from Ford).
This chart is for an R34. Notice that the engine oil, and front and rear gear oil recommendations are based on ambient temperature. If you live somewhere cold, you want a thinner fluid if you drive in cold temps. If you live somewhere hot, you want a thicker fluid to help protect when it is hot.