There is nothing wrong or incorrect about Champion RJ--12YC. There are other brands with numerous identical features as the NGK offerings. Probably, the most important consideration, AFTER determining the REACH, is the heat range, electrode type and materials of construction, gap configuration, whether resistor or not, and the intended use. The advocates of NGK vs every other brand have their own reasons for their selection....but...never seem state the reasons....just "they're the best"...what ever that is.....cost, availability, life, performance or some combination of all the above. Those that profess NGK's are best entitled to their opinions, and seldom say exactly reasons..but for those inquiring as to WHY....its like saying: "how high is up"..... The engine will tell you what it likes.....if you listen to it....not just hearsay, without un-substantiated opinions by others....make your own decisions, you'll learn more. Just talking out loud.....
