Could be the picture, but that looks more like a rub mark from something than a crack on the engine mount. In any case, a crack is much more likely to occur at a weld, and be circumferential, than lengthwise.
A problem with the engine mount also will not be connected to a rise in ferrous metals in the oil analysis. You are chasing two different problems, unrelated, and one of which may not be a problem at all.
Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2022 dues paid
N16GN flying 1,000 hrs and counting on 91E10; IO360, SDS, WWRV200, Dynon HDX, IFD440, G5
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
Pending Repeat Offender - 10 kit is on order. TDI? Turbine? Stay tuned!