I'm ready to change my plugs. Bought some NGK ITR5F 13 for my '04 6i. Want to know if anyone "HAS ACTUALLY" put these in and has "GOTTEN" some miles, not a day or 2or 3. Had previously bought 2 different NGK's, (NKG V- Power, Iridium IX). Didn't install either, but checked at the dealer. I asked them which plugs they put in when doing their $165 tune-up, they told my the ITR5F 13 was the correct 1 for my model year. So I don't want to here about how great all the other plugs are. Just the one that I asked about PLS. And THX in advance.