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Old 06-28-2010, 10:19 AM   #7280
GTAHVIT
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Drives: 2013 Sonic RS MT
Join Date: Dec 2007
Location: Saint Augustine FL
Posts: 28,441
DOHC motors are generally more fuel efficient. And lets not forget the LS3 is 6.2 L.... More displacement = more fuel....

I'm pretty impressed that with over a liter more displacement we are even close to the 5.0 in MPG...
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