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Old 03-14-2013, 10:07 AM
Crowley's Avatar
Crowley Crowley is offline
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Join Date: Jan 2013
Location: Fort Polk, LA
Age: 27
Posts: 27
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Vehicle: 2004 Dodge Ram
Trim Level: SLT
Color: Black
Engine: 2003-2008 345ci (5.7L) Hemi V8 345hp 375lb/ft
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I also have a similar setup on my '04 QC. K&N CAI with flowmaster 40. I love the way my truck acts on the Superchips tunes. But in my opinion, even the economy tune is bad for economy. It changes the shift points for higher rpms which is never good for saving gas. I use it for fun though. I only run on the 91 tune with 93 fuel. I generally get 17-18 MPG at 55-60 MPH. But I love the feel of acceleration, so I only get 9-10 in the city. If only it was physically possible for me to drive conservatively. If you do the math, 26 gal. tank x $3.57/gal for 87 comes to $92.82, whereas $3.87 for 93 comes to $100.62. An $8 difference for fancy fuel that will never hurt my engine. And that's filling the entire tank. The gap closes by about $2 when I actually fill up (usually 20 gallons). It took me a while to accept it, but I don't think there's much we can really do to get noticeably better economy with these engines without dropping 6k or so for forced induction and proper tuning.

Last edited by Crowley; 03-14-2013 at 10:15 AM.
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