Octane Requirements

Discussion of the 5.7L-6.1L-6.4L HEMIs.

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Octane Requirements

Post by hades » Fri Oct 24, 2003 6:00 pm

I just purchased my Hemi 1500 QC 4X4 yesterday, and did something strange... I actually read the owners manual. It has a picture saying to use 89 Octane for the 5.7, however if you read it says to use fuel with an octane rating of 87-89. What is the story?

Road Rash
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Joined: Fri Oct 10, 2003 4:36 pm
Location: Kiel, WI

Post by Road Rash » Sat Oct 25, 2003 7:54 am

89 is recommended for best performance however 87 is acceptable to use also. I've only used 89 octane in my truck since I bought it in May.
2003 Atlantic Blue Ram 1500 SLT 4X4 QC short box Hemi with 3.92 LSD and 20" wheels.
Magnaflow SS muffler #14589


Post by hades » Sat Oct 25, 2003 3:48 pm

I was wondering if I would get a performance differance using 87 or 89.

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