2003 Ram 1500 with 4.7L
This is the excerpt from the 2003 FSM:

Chrysler had all their dealers switch to 5W-20 across the board between 04 and 05 to standardize oil across the engine lines. The 5W-20 is especially important to the MDS hemi so that the solenoids work correctly. I would stick to what is called for (I use 5W-30 synthetic in mine).

Chrysler had all their dealers switch to 5W-20 across the board between 04 and 05 to standardize oil across the engine lines. The 5W-20 is especially important to the MDS hemi so that the solenoids work correctly. I would stick to what is called for (I use 5W-30 synthetic in mine).




