Experts,

Here is my tentative itinerary.

KE 654 H 23DEC 5 BKKICN HK1 1 0120 0830 *1A/E*
KE 001 H 23DEC 5 ICNLAX HK1 1120 0730 *1A/E*
DL8553 Q 30DEC 5 LAXCDG HK1 2 1520 1105+1 *1A/E*
OPERATED BY AIR FRANCE (AF065)
AF1648 V 31DEC 6 CDGBCN HK1 1225 2F 1255 1440 *1A/E*
AF1649 V 07JAN 6 BCNCDG HK1 1515 A 1545 1740 *1A/E*
AF 166 V 08JAN 7 CDGBKK HK1 2215 2C 2315 1625+1 *1A/E*

I have 2 Questions:

1. Is it allowed to choose the code-share flight (DL8553) instead of AF065 on the RTW ticket? I wanted this because I plan to request mileage upgrade on DL flight using my Skymiles miles (which leads to the next question.
2. Is DL Q fare eligible for milegae upgrade?