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|General Challenger Discussion This section contains general discussion about the Dodge Challenger. If it does not fit into a more specific area, it probably belongs in here. (Dodge Challenger General Discussion)|
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I was under the impression the R/T with auto should be middle (89) level.
I know the manual R/Ts have to run 91 since it's stated in the owners' book and on Dodge website.
3.5L and 5.7L Engines (with Automatic
The 3.5L and 5.7L engines (with automatic
transmission) are designed to meet all
emissions regulations and provide satisfactory
fuel economy and performance when
using high-quality unleaded gasoline having
an octane range of 87 to 89. The manufacturer
recommends the use of 89 octane for optimum
performance. The use of premium gasoline is not recommended,
as it will not provide any benefit over regular
gasoline in these engines.
5.7L Engine (with Manual Transmission)
The 5.7L engine (with manual transmission)
is designed to meet all emissions
regulations and provide excellent fuel
economy and performance when using
high-quality premium unleaded gasoline
with an octane rating of 91 or higher.
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