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The best spark plugs are OE spec.
Cars' machine spirits are picky about the plugs you give them and while a "better" plug may be better in some other application, it's not the plug that the engineers designed your engine around.
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Quote:
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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