This is a lie, as anyone that can perform arithmetic can attest to. Iridium spark plugs are the best bang for the buck. Over the course of 100,000 miles, you will save both money and time.Originally Posted by AjL227
Coppers to get 100,000 miles: $2 * 6 plugs = $12 * 7 installs = $84 + 1/2hr labor @ $7.25/hr *7 installs = $109.38
Iridiums to get 100,000 miles: $8 * 6 plugs = $48 * 1 install = $48 + 1/2hr labor @ $7.25/hr *1 install = $51.63
Not to mention the couple hundred dollars (maybe $20/yr@12,000mi/yr) you'll save over the course of 100,000 miles in gas by using the more efficient plugs.
