2003 Dodge RAM 1500 Fluid Specs 1 Engine Oil. Dodge recommends 5 quarts of SAE 5W-30 oil with a new oil filter when changing the oil in the 3.7-liter and 5.9-liter engines. 2 Transmission Fluid. ... 3 Transfer Cases and Differential. ... 4 Power Steering. ... 5 Brakes and Clutch. ... 6 Cooling Systems. ... 7 Fuel. ...