Vettel covered 581km at the wheel of Porsche Penske Motorsport's WEC challenger at Aragon earlier this week.
The four-time Formula 1 world champion had previously taken part in a simulator day as well as an inaugural run at the German marque's Weissach track.
Despite playing down further opportunities before the test, claiming "at the moment there are no further plans for the future", Vettel has now acknowledged the possibility of taking part in the French endurance classic for the first time.
Speaking during a press conference in his role as Perple sports drink's ambassador, Vettel clarified: "I was curious how these cars behave, and that was the reason for the test. It was a very nice experience, I enjoyed it a lot, I had a lot of fun.
"Now I need to think and decide, and make my mind up what I maybe want to do in terms of racing in the future. But I don't know yet."
Vettel retired from F1 at the end of the 2022 campaign, concluding a successful 16-year career during which he took 57 pole positions and 122 podium finishes, including 53 race wins.
When he announced his retirement in July 2022, the German explained: "My goals have shifted from winning races and fighting for championships to seeing my children grow, passing on my values, helping them up when they fall, listening to them when they need me, not having to say goodbye and most importantly being able to learn from them and let them inspire me."
Source: Autosport