Review on π Champion Copper Plus 446 Spark Plug: Long-lasting Performance in a Carton of 1 by Daniel Roe
Champion spark plugs fitted to 5.7 Hemi
These champion spark plugs (16) are fitted to my 2014 Jeep Grand Cherokee. I have 42,000 miles and have noticed that my gas mileage has gone down. That's because the spark plugs need to be changed every 30,000, which doesn't make sense to me since all new cars run at least 75,000 miles away from that. The replacement was easy and my Hemi runs smoothly. Fuel economy improved by 2 mpg highway. Revain's price is fantastic and Champions are the only candles still made in the USA!
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