120,000 miles (193,000km) on this hemi and not a single problem, ever. *knocks on wood* Have always ran synthetic mobil 1 and 89 octane. Now with a tuner, I'm running 92 octane.

 

i didnt even read this thread but i will respond to the title. i love my hemi but i would trade it for my old 5.9 any day

 

The 5.9 I had in my 2nd gen was one solid engine (never had a single problem with it) but it performed like a dog. I don't think I could ever go back.

 

I never knew that the Hemi needed 89 oct min, I will be running the higher grade untill I install my hiper tech 3. Not sure the out come on my buddies truck but will let you know what is going to happen as for my truck will have to wait till Monday as I have to get the wife to drive me to work.

 

A co workers 07 hemi 1500 has taken to drinking anti freaze, 30,000 Km on the truck, I have heard that hemis burn anifreaze, but Never had first hand expeirance with this ...

In canada its 3 years or 60,000 Km bumper to bumper, 5 years or 100,000 KM powertrain..

I allways run 89 octance, and on the highway, 94 octane ( husky mohawk )

 

If the manual doesn't state 89 octane only and the engine goes b/c of 87 then dodge should fix it. Tell your friend to try another dealer b/c unless he didn't perform the proper maintenance they should honor their warranty.

 

Here we go again....everybody open up your owner's manuals. OK, it says in black and white, "octane range of 87 to 89". Forget it, I'll post a picture:

 

yours is an 03. my 05 manual says 89. and plus saving a few cents isnt worth a blown piston or other engine problems.

 

I always thought that was a bit misleading in the manual anyway. The big boxes specifically say 87 octane (all engines EXCEPT 5.7L) and 89 octane (5.7L engines)

Then when you read the paragraph for the 5.7 it says min. octane range 87-89.

Bottom line still is of the couple dozen people I know of who have experienced frying a cylinder, almost all have admitted to using 87 octane fuel over the long term and I strongly suspect the few who didn't own up to it, ran it, but wouldn't admit it...

Pay the extra couple bucks a tankful and use 89 octane fuel or risk a chance on blowing the engine, your call...

 

Lonestar, did you miss something? 'can meet emissions on 87-89. manufacturer recommends 89' is what it says. With a big 89 where it says 5.7L engine.