Mazdaspeed 3/6 UOA Results

[Crossbow]

Looks like wear is stabilizing. You could probably skip the next UOA, and do one at 10k miles, and the metals will probably be even less.

It's interesting how UOA's show how long true engine break-in takes. It's usually 10-20k miles before the wear metals finally start being very consistent between intervals.

[div2]

Originally Posted by Crossbow Looks like wear is stabilizing. You could probably skip the next UOA, and do one at 10k miles, and the metals will probably be even less. It's interesting how UOA's show how long true engine break-in takes. It's usually 10-20k miles before the wear metals finally start being very consistent between intervals.

I'll probably keep tracking the trends at 5K mile intervals. What can I say? I'm an OCD car geek... As for long break-in periods, that was certainly the case with my '95 318ti. I switched to Mobil 1 15W-50 at 4K miles, and the 1.8 liter inline four didn't fully break-in until 21K, when highway mileage suddenly jumped from 28-30 mpg to 31-32 mpg. It's now racked up almost 112K, so I think I'll have a couple of UOAs done just to see what's going on.