PSG play Atletico Madrid in their second match in Singapore on Monday before a French Super Cup meeting against AS Monaco in Shenzhen next week ahead of the Ligue 1 opener against Caen on August 12.
Ozil certainly proved his doubters wrong with a goal in the opening 13 minutes.
Adrien Rabiot captained Thomas Tuchel's weakened side who could not prevent Pierre-Emerick Aubameyang from finding the back of the net as he slog past Gianluigi Buffon within the first quarter of an hour.
PSG on the other hand featured a lot of youngsters with notable absentees being Neymar, Kylian Mbappe and Edinson Cavani - all of which played in the 2018 World Cup. Subscribe to our SMS sports service by texting "SPORTS" to 22840.
Christopher Nkunku's second half penalty briefly drew PSG level, but otherwise they were no match for Unai Emery's much stronger squad.
Nkunku was not to be denied from the penalty spot, however, sending Martinez the wrong way with a spot-kick awarded on the advice of the assistant referee after Weah had tumbled spectacularly following a clumsy Sead Kolasinac challenge.
Alexandre Lacazette's quickfire double and late strikes from Rob Holding and Eddie Nketiah then turned it into a rout against a youthful PSG - the former club of new Arsenal boss Unai Emery.
That ushered in a period of control and they nearly got a second in the 23rd minute, but Iwobi was denied when one-on-one with Buffon at the end of a slick passing move. The French striker made an instant impact poking home Smith Rowe's cross from the right flank in the 67th minute.
The Gunners are now in Singapore, where they will take on French giants Paris Saint-Germain in a friendly on Saturday.