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Old 03-27-2009, 08:30 AM
Posts: n/a

i tried 87,89, and 93 in my 05 Ram Hemi and i actually noticed that the truck runs better on 89. you can put 87 in and its fine but the owners manual also said for top performance put 89 and that 93 premium or higher would actually cause harm to the engine. But thats talkin about a completely stock engine. so unless i mod out my truck like crazy im sticking with mid grade
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