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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #21  
Old 01-11-2013, 03:04 PM
kkreit01 kkreit01 is offline
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Without a tune, the manual specifically states the use of premium fuel is not recommended. In my previous Hemi, I ran 87 and 89 -- depending on prices. I noticed no difference. Currently, I've only run 89 in my Ram. If gas gets up above 3.50, I may switch to 87.
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  #22  
Old 01-11-2013, 05:12 PM
Hermes1 Hermes1 is offline
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I would run what the manual recommends no more, no less. If the manual indicates 87 is ok to run, it probably will be fine for normal driving. if however you are going to use your truck to carry heavy loads or towing a trailer, particularly in hilly or mountainous terrain, I would consider using the 89. In any case if you do not get any knocking, the fuel you are using should be fine.
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  #23  
Old 01-30-2013, 12:24 PM
rammedifiknow rammedifiknow is offline
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again, i have to say this. super. i have not had a single problem in over 17k. regardless of what the manual says. i mean why would any car company want your engine to burn cleaner, only means that they cant look for blown engines to replace. lol
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  #24  
Old 01-30-2013, 06:32 PM
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I drive across town to the only place I can get the good stuff pure 93 and im running a 91 custom tune
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  #25  
Old 01-30-2013, 08:00 PM
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Quote:
Originally Posted by Chris b View Post
I drive across town to the only place I can get the good stuff pure 93 and im running a 91 custom tune
I currently drive about 30 miles to get 93 however it is normally always on my way to wherever I am going or on my way back so it is no big deal to go get it, I have always ran 91 or 93 in all my gas vehicles regardless of what the manual says, and regardless of weather or not I am running a tune and have never had an issue.

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  #26  
Old 01-30-2013, 09:13 PM
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Burning 89 as that is what is recommened, that is of course until a 91 tune is done next year. Like to make sure that if there is any engine or drive line issues that they are taken care of under warranty. If something is seriously wrong it should happen in the first year or so. jmo
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  #27  
Old 02-01-2013, 03:09 AM
S.C. Express S.C. Express is offline
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I have tried it all... 87 with and without ethanol, 89 with and without ethanol, 91 with ethanol, 93 with and without ethanol. 87 with ethanol runs great for me, no engine noise even at high rpm's. Ambient temps make more of a difference than the fuel I am using on my untuned truck. I'll save my money and keep running 87 until I get a tuner and can see what all the hype is about.
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