Replace them with OE plugs. Not what the parts store has on hand that will fit, not what got slapped in sometime over the car's last 15 years, but the actual NGK (or whatever) part number that your car left the factory with.
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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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