I think it's notable when a company still specifies any xW-30 these days, especially when most of their other engines are running on xW-20. In the case of the Chrysler 3.5L/4.0L, it'd take a lot for me to deviate away from the recommended 10W-30. It'd be REAL easy for Chrysler to specify a 5W-30 for that engine. Unlike some 0W-xx oils, 5W-30 is readily available and nothing exotic. It's available in both conventional and synthetic.
But yet Chysler recommends a 10W-30. There's got to be a reason for that. We've speculated about what that is, and yeah, I'm sure a high quality synthetic 5W-30 would be fine. There's just something about me that can't get passed that 10W specification.
But yet Chysler recommends a 10W-30. There's got to be a reason for that. We've speculated about what that is, and yeah, I'm sure a high quality synthetic 5W-30 would be fine. There's just something about me that can't get passed that 10W specification.