Why worry about it. I think I lost one or both years ago. Who cares.
Oh may be that's why my car uses oil, and has tranny issues. Worry about the important things.
175,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.