Originally Posted By: JohnnyJohnson
Seems like your Iron numbers have increased substantially.
"Substantially" and "statistically significant" are almost always two completely different things for most people... one is off gut feel/ shock value, the other is from data.
My iron number on my Fusion has increased from 7 to 18 ppm, but my OCI has gone from 7k to over 17k. You might call this Iron number a substantial increase, but statistics show that the wear rate has only gone up .07ppm/1k miles, and that there is absolutely no statistical difference between the wear rates at 7k or 17k in my engine, which means the engine doesn't know or care about the difference. That's from 100k of UOA data.