Mu Rufeng thought for a moment, then deactivated the Mecha Mode and took down the Flame Vehicle Card.
Because it was in the Fiery Fire War Machine Mode, Ma Qiu was at Level 6 and had not reverted to a Level 5 vehicle.
Mu Rufeng then attached the Flame Vehicle Card again, and Ma Qiu rose to a Level 7 vehicle.
Afterward, Mu Rufeng once more activated the Mecha Mode, Ma Qiu remained a Level 7 vehicle, but he could feel that Ma Qiu had been strengthened, although not to the extent of a Level 8 vehicle.
Mu Rufeng tested it several more times.
Now Mu Rufeng understood that the Mecha Mode had indeed been weakened.
The upper limit was Level 7; even if you transformed after reaching a Level 7 vehicle, it would not be upgraded to Level 8.
However, it wasn't necessarily so; it was possible that the Fiery Fire War Machine Mode was still too weak to support reaching Level 8.
What if Ma Qiu was at Level 6 and then he activated the Mecha Mode again? It might just have reached Level 8?
