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Old 11-27-2012, 03:09 PM
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acs0424 acs0424 is offline
Dodge Ram Forum Senior Member
Join Date: Oct 2012
Location: Massachusetts
Age: 21
Posts: 194
Gender: Male
Vehicle: 2007 Dodge Ram 1500
Trim Level: Big Horn
Color: Black
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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Seeing as you're getting a Diablo Tuner this may be irrelevant, but run mid-grade fuel. I switched from 87 octane to 89 octane at the advice of a friend who was a mechanic for years and knows a crap ton about Dodge. I gained a noticeable MPG improvement in the city and highway, enough so that the extra cost of mid-grade was off-set by the MPG improvement, and there's a slight performance gain. So yeah, run mid grade fuel. That's what the manual recommends anyways.
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