Wow...0W-40 oil recommended for truck 6.4.
Originally Posted by SRTian
It's referring to the 5.7 hemi. The 3.6/6.4 shows 87 to be recommended. It's written the same in my hard copy owner's manual.
And he is correct:
These engines are designed to meet all
emissions regulations and provide excellent
fuel economy and performance when
using high quality unleaded “regular”
gasoline having an octane rating of 87. The
use of premium gasoline is not recommended, as it will
not provide any benefit over regular gasoline in these