Transmission (Amigo, Pickup, Rodeo & Trooper)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1992 Isuzu Trooper, 1992 Isuzu Stylus, 1992 Isuzu Rodeo, 1992 Isuzu Pickup, and 1992 Isuzu Impulse. However, it is still accessible from the selected car via links, so may be relevant.
Use SAE 5W-30 SF engine oil at ambient temperatures less than 90°F (32°C). At temperatures greater than 90°F (30°C) use SAE 20W-40 or 40W engine oil.