Thread: PLEASE tell me my MPG will improve?!
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Old 04-09-2006, 07:42 PM   #16
siverado05
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Re: PLEASE tell me my MPG will improve?!
My 05 5.3 HO Z71 gets 16-17 around town, 21 highway. It's possible your gearing is wrong for the engine and truck size. Higher gearing does not always equal better mpg. Engines have an rpm range that they are most effective in,
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