Autolite Single Platinum spark plugs have all the features of our traditional plugs with the addition of a full platinum tip on the center electrode. This platinum point delivers precise firing with virtually no gap erosion up to 50,000 miles. Resistor plugs minimize electronic interference and can aid in reducing electrode erosion. Copper core aids in cooling and improves resistance to fouling. Power tip or extended electrode plugs project the firing tip into the combustion chamber which not only aids in cooling but also cleaning so that fouling is reduced at low RPM.
Comment: OK - Its not Bosch. So if you are expecting Bosch quality, you are mistaken (even if the quality is perceived instead of factual). Then again, its not 15 bucks each (its 15-25% of that). I started using Autolite platinum about 5 years ago after being in a bind, and not being able to find a place open on a Sunday that stocked Bosch, and having a Bosch plug that suddenly quit working in my Volvo S80. I, sceptically, bought this type of Autolite and used it and was unexpectedly surprised. I guess dont knock it till youve tried it. Been using Autolite Plats ever since (This purchase was for my Mercedes). They do the job, and they do it well. Never had a problem. Lasts just as long. Gets fouled the same as Bosch, and it costs so much less.