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Old 01-23-2013, 02:00 PM
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snrusnak snrusnak is offline
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Join Date: Jan 2011
Location: Orlando
Age: 27
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Vehicle: 2010 Dodge Ram 1500
Trim Level: SLT
Color: White
Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
Rep Power: 12
Rep:1385
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It is possible that the O2 sensor can be faulty and not trigger a check engine light. If you do replace the O2 sensors, only replace the upstream ones(ones closest to the engine). Do not waste the money replacing the downstream sensors(in or after the catalytic converter(s)) as they are just for emissions and will not effect performance or mpg.

You should be getting closer to ~15mpg.

Also, looks like your already bought that fuel cleaner, but I wouldn't waste any more money on that. If anything just run some sea foam through the engine, but this isn't your issue.
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