He did lead for a lap mid-race after Whincup peeled into the pits, with Shane van Gisbergen right behind him, and says he relished the opportunity to race against two drivers he looked up to as a child.
"It was a really cool feeling racing against all the top drivers in Australia and some world-wide, it was definitely a cool experience," Mouzouris told Supercars.com.
"Especially Whincup and Shane, definitely looking up to them when I was a kid.
"I've still got a photo from almost five or six years back of me and Shane together, sort of always wanting to join the team.
"I guess it has finally come to reality and I've now had to change to race against them... it was an awesome experience getting to race against them, it was super cool.
"Even learning how they race as well, it sort of reflected in their driving style in the Eseries, especially blocking and techniques to get past cars, which was cool to learn."
Joining Mouzouris last week as wildcard entrants were two-time Supercars champ Marcos Ambrose and international stars Joey Logano and Alexander Rossi.
Despite Mouzouris' overall results, the teenager put in a generally solid showing and felt he proved he could keep up with the top competitors.
Unfortunately the Triple Eight Super2 driver was caught up in the wars within most races, reflecting in his results, but says he'd 'love another shot' at the series.
Mouzouris puts his impressive Eseries pace down to 12-hour days of practice he put in with engineer Heycoop, as well as learning to control the in-game brake bias controls.
"To be honest I got super unlucky without a doubt, every race I was getting involved in crashes through no fault of my own, which was the unfortunate part," Mouzouris said.
"My engineer and I spent 12-hour days testing for this and to come out like that was pretty disappointing, but we showed our pace, we were strong and especially in the last race, with tyre conserving and all of that.
"We were in the top five for most of the race and even took the lead, which was pretty awesome to see.”
The next round of the BP Supercars All Stars Eseries will be held at Belgium's legendary Circuit de Spa-Francorchamps this Wednesday, beginning with qualifying at 6pm AEST.