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I know that how I am presenting this is not very scientific, however my fuel economy is definitely higher than the 6 weeks preceding my upgrade. I had all the mods I noted and the weather was just as cold. Others also report an improvement in mpg after doing the big three upgrade.
It makes sense to me as why this could be, because the spark plugs require electricity to ignite the air/fuel mixture in the combustion chamber. Something important that I should have noted in the first post is that I do not have the OE cap and wires. I have a mild performance set with my plugs gapped larger than stock.
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