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Howdy neighbor, is that Saturn a 5spd? I was reading here about a 5th gear swap that helps out mpg, I can't remember the years it covers. But they said it could be done while the trans is still in the car. Make sure your engine temp. is normal, I've replaced alot of t-stats on saturns for poor mpg & little heat, they like to stick open causing long warm ups & cooler operating temps.
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