Quote Originally Posted by Reefer82 View Post
Don't cost much more than stock plugs?? I recently bought a dozen 104s and after rebate I'm looking at about a dollar a plug, maybe less. I could buy 6 dozen plugs for what the pulstars cost. Even at 20k a year that'd last you at least as many miles and you'd know you have a consistent gap, regular interval changes that would alert you to potential issues, ect that and you'd be skilled enough to change plugs in 5min or less.
With your special rebate (everyone else pays $2/copper), you're looking at $42 to cover 100,000 miles, which is nothing to sneeze at. That's $84 for the rest of us that can't find a good deal. The pulstars are like $75 (?) for the same 100,000 miles and would require 6 less plug changes. Most of us take at least 20 minutes, so that's at least 2 hours of your life you could spend getting laid or kicking hobos or something like working overtime. Let's say you make $30/hr on overtime... that's ~$35 after taxes in your pocket, making the total price of iridiums only $40.

Say you get a 3% increase in mileage from these over stock. 100,000 miles ought to save you ~$375 in gas over 5 years, resulting in you actually getting paid $335 when coupled with that OT you put in, just to install these plugs. If that all goes to gas, it means he can drive ~2,700 miles farther than you with the same money. Did I math right?

Stock vehicles come with iridiums and he's got a stock vehicle. Perfect.

Personally, I'd check and re-gap an iridium plug at 50,000 miles - at 70k, mine were baaaarely out of gap, but my mileage was starting to hurt.