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Old 11-11-2009, 10:29 PM   #2 (permalink)
JasonG
Master EcoModder
 
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Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 728

05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
Thanks: 120
Thanked 56 Times in 52 Posts
never used that but they make radiator tabs that are fantastic!
They last and dont plug what they aint supposed to.
BTW, your gas mileage seems mighty low for a firefly.
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I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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