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I'd be leery of "better mpg" claims from higher octane. It doesn't have more energy per gallon, it has more resistance to combustion, which allows for higher compression. It's not "better gas" so much as "gas that is specified for higher compression engines." It's "better" for them, more expensive for us.
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Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
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