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Old 01-11-2013, 10:56 AM
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latitud latitud is offline
Dodge Ram Forum Senior Member
Join Date: Jun 2010
Location: Southwest VA
Age: 44
Posts: 575
Gender: Male
Vehicle: 2010 Dodge Ram
Trim Level: SLT
Color: Deep Water Pearl
Rep Power: 6
latitud will become famous soon enough

The manual says 87 acceptable, 89 recommended.
Must be a different manual than mine. My 2010 says 87 for all engines except 5.7.
For 5.7 it says 89

All engines (except 5.7L engines) are designed to meet all emissions regulations and provide excellent fuel economy and performance when using high quality unleaded “regular” gasoline having an octane rating of 87. The use of premium gasoline is not recommended, as it will not provide any benefit over regular gasoline in these engines.

5.7L Engine
The manufacturer recommends the use of 89 octane for optimum performance.
2010 Dodge Ram, 5.7 Hemi, Crew Cab
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