Two times, mainly due to time constraints.
the VSR 6h of Le Mans (2019) and 12h of Le Mans (12 Hours). (it's a small german league I used to race in, mostly Pcars 2 but the Endurance Races were in AC.
Results wise not so great, both were a struggle but in the end I had fun and Endurance suits my driving style, I'm not the fastest but usually pretty safe (if I have a well set up car to work with) and I can take good care of the fuel and tires. So my job is usually to reduce the ammount of stops.
The first one the six hour race was a bit of a bummer, because I joined someone driving the GT4 Cayman...which I didn't like too much and that guy never showed up to the race, so I raced it alone for about 4 hours in total. After an enforced break after AC kicked me out for not giving back laptime after one of the first laps....I had to give up some space for overtakers and go off track near the Ford Chicanes.
In the end a bit sad, because I and the car didn't gel well and I was horribly off pace, especially as we had rather low temps due to a fault in the server setup and all of us GT4 runners couldn't get the hard tires (our only compound) up to temp.
Somehow got the Car to go 276 due to my setup on the straights......which made it impossible for the other GT4 to overtake and the overtakes by the GTEs really hairy. As the only way they could really overtake me in that car was to divebomb me into the corners or pass in them.
Well while it was what we germans call a Boden-Boden Rakete (surface-to-surface missile) on the straights, it was bad in the curves, especially the Porsche Curves.
Finished second or third in Class IIRC (of 4 running cars) due to me running the longer stint of us two solo runners.
We didn't run GT4s again as there was just too much of a speed differential in the corners and not enough on the straights.
Was a study in frustration that race, especially as I found out afterwards in trainng that my pace in the GTEs would have thrown me smack dab in the midfight field for a great battle.
Second one I had a great team in LMP1....but we had setup troubles and never got the kinks quite worked out before the race so we had a pretty unstable setup that cost us in the race.
And well our first driver got punted and damage on the formation lap, he elected to stay out and repair at the first pit stop, but that cost us a lot of time, putting us out of contention from the get go.
After that it was damage limitation, we did not finish as the last LMP1 running, mainly by dint of us keeping the car alive and safe for that first stop mostly out of the pits, despite a few spins and other problems.
Final overall position was P9, before the second to last LMP1 at P10, the last LMP1 was in P30 due to crashes of both kinds and repairs.
We did coordinate well, with one driving and the other spotting and the third resting, was the one driving the last stint and we were all happy to have finished.
It was an achievement, to have made it, as LMP1 lost 3 cars to DNF, GTE three as well and GTE am 2.
Tipp, prepare for it, because even if it's just simracing, you will feel the strain after a few hours if you aren't properly trained.
Drinking and having to visit the loo wasn't an issue for us, as it was during the hot sommer, so we had something like 30+ Degrees C outside and our rooms resembled race cars in their temps.
So drinking wasn't an issue, however we all stank to the high heavens afterwards.
And were absolutely shattered.