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Old 10-28-2008, 08:38 PM   #6 (permalink)
wagonman76
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Join Date: Jun 2008
Location: Northwest Lower Michigan
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Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
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Should be always enabled as long as you are using the OD position on the gearshift. Then its your 4th gear. It probably kicks in at about 50 mph.
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