Took the plunge - Cummins to Hemi 6.4
After reading posts, reviews, specs, watching videos, and a few test drives, I finally decided to take the plunge. I sold my 2003 Ram 2500 QC LB 4x4 Standard output 5.9 Cummins 5 speed and bought a ne...
Forum Discussion
vortec22 wrote:
Congrats on the new truck! I am sure you will enjoy it. Only question I have is what octane of gas does the 6.4 need? I am assuming probably 89, does 87 slow it down at all?
Thanks.
Just plain 'ole 87 is the recommended octane for the 6.4. I think, but am not 100%, that the 5.7 recommended is 89.
