Thread: 3.8L Grand Prix...
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Old 08-09-2014, 05:57 AM   #8 (permalink)
Zenix
EcoModding Lurker
 
Join Date: Jul 2014
Location: Wisconsin
Posts: 4

Caitlin - '03 Pontiac Sunfire GT
Team Pontiac
90 day: 44.11 mpg (US)

Scurvy - '99 Pontiac Grand Prix GTP
3800
Sports Cars
90 day: 25.55 mpg (US)

Vibe - '09 Pontiac Vibe Base
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Adjusting driving habits seems to work best for me. I have a 99 gtp with a supercharged3.8L
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