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Old 09-13-2011, 06:27 PM
belle belle is offline
Dodge Ram Forum Senior Member
Join Date: Jan 2011
Location: NEPA
Posts: 132
Gender: Male
Vehicle: 2011 Dodge Ram Laramie
Trim Level: laramie
Color: rugged brown two tone
Engine: 2009-2010 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 0
belle is on a distinguished road
Default MPG and Octane conclusion

After 10,000 miles of experimenting with different octanes, I have come to this, my personal, conclusion. My 2011 Laramie Crew Cab runs better, sounds better, and gets better mpg primarily using 87 octane and occasionally using a tank of 89. I use the 89 about every fourth fill just to be clean up any problems, if any, with the 87. My biggest concern is with ETHANOL !!!
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