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Old 02-09-2010, 07:11 PM   #13
ProStreet68SB
The Engine Whisperer
 
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Join Date: Sep 2006
Location: Ohio
Posts: 770
Re: 88-90 454 gas mileage

dad used to have a 90 ss454 and with true duals without cats, we got 13 going up to norwalk and back, but it normally averaged around 10mpg.
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