Halfway complete and here are the results. As a side note, all of these runs were with the DFGT in bumper or cockpit view (where applicable) with all assists off except use of traction control in cars that have it. Many of these cars I've never driven before, let alone at night and in the wet. This may explain why many of my times are pretty slow.
So far the weather results are rain, and a lot of it. Other than the first run with the Zonda, the conditions were well over 50% wet surface with an hour or so where it dried out overnight. I was really relieved when the sunlight started to show around 5 a.m.
All in all this was pretty exhausting, and I still have 12 more hours to go. The most difficult weather setting was deciding the overall conditions before each run. While not scientific, I tried to select a condition that best represented what I finished with in my previous run. This was very difficult to determine at night. For example, if I started a run with 75% conditions and finished with no visible rainfall, I reduced the setting by 25% for each time that I completed a lap with no rainfall. This was easier to figure once the sun came out.
1900: Pagani Zonda C12 '00, PP 517, SH, dry, 8:38.868
1920: Mazda Familia Sedan Sport 20 '02, PP 375, CS, 0-13% wet, 10:12.008
1940: Mazda Roadster RS (NC) '07, PP 405, SH, 9-45% wet, 10:04.764
2000: Ferrari 599 '06, PP 544, SS, 45-57% wet, 9:54.566 (I)*
2020: Honda INTEGRA TYPE R (DC2) '98, PP 407, CS, 47-60% wet, 9:50.505
2040: Volkswagen Lupo Cup Car '00, PP 382, SH, 38-50% wet, 10:17.318
2100: Opera Performance S2000 '04, PP 481, SH, 37-67% wet, 9:56.414
2120: Chevrolet Camaro LM Race Car, PP 638, RR, 54-70% wet, 9:23.036
2140: Volkswagen Lupo GTI '01, PP 343, CS, 47-72% wet, 10:47.745
2200: Mazda Autozam AZ-1 '92, PP 317, CS, 57-70% wet, 11:58.702 (I)*
2220: Toyota 86 GT '12, PP 405, SH, 42-60% wet, 10:19.060
2240: Mazda Furai Concept '08, PP 655, RI, 7-51% wet. 8:39.532
2300: Toyota Prius G Touring Selection (J) '03, PP 327, CM, 51-96% wet, 11:35.779
2320: Mazda 2, PP 335, CM, 100% wet, 12:02.498
2340: Mercedes-Benz A 160 Avantgarde '98, PP 318, CM, Weather at start 75%, Changeability 2, 100% wet, 12:15.50
0000: Dodge Challenger SRT8 '08, PP 485, SH, Weather at start 75%, Changeability 2, 85-100% wet, 12:04.920
0020: Jay Leno Tank Car '03, PP 526, SH, Weather at start 50%, Changeability 2, 64-90% wet, 13:09.644
0040: Nissan Skyline GT-R V-Spec N1 (R32) '93, PP 448, SH, Weather at start 25%, Changeability 10, 44-60% wet, 10:24.726
0100: Ford SVT F-150 Lightning '03, PP 442, CS, Weather at start 0%, Changeability 5, 21-40% wet, 9:56.414
0120: Nissan Calsonic Skyline GT-R Race Car '93, PP 563, RH, Weather at start 0%, Changeability 9, 10-20% wet, 8:49.414
0140: Mitsubishi Lancer 1600 GSR Rally Car '74, PP 416, SM, Weather at start 0%, Changeability 4, 2-10% wet, 9:25.817 (I)*
0200: Volvo 240 GLT Estate '88, PP 306, CM, Weather at start 0%, Changeability 4, 0-36% wet, 11:20.076
0220: RenaultSport Lutecia Renault Sport V6 24V '01, PP 436, CS, Weather at start 75%, Changeability 8, 40-81% wet, 10:04.729
0240: Citroen 2CV Type A '54, PP 206, CM, Weather at start 75%, Changeability 5, 80-100% wet, 17:57.310
0300: Ford GT '05, PP 562, SH, Weather at start 75%, Changeability 4, 87-100% wet, 11:56.085 (I,3)*
0320: Hommell Berlinette R/S Coupe '99, PP 391, CS, Weather at start 50%, Changeability 9, 76-90% wet, 11:41.293
0340: Bugatti Veyron 16.4 '09, PP 636, SH, Weather at start 25%, Changeability 10, 80% wet, 11:14.855 (I)*
0400: Opel Speedster Turbo '00, PP 419, CS, Weather at start 25%, Changeability 7, 80-100% wet, 11:24.789 (I)*
0420: Volkswagen Lupo GTI Cup Car (J) '03, PP 376, SH, Weather at start 75%, Changeability 3, 88-100% wet, 12:04.167
0440: Mercedes-Benz SLK 230 Kompressor '98, PP 396, CS, Weather at start 50%, Changeability 10, 74-90% wet, 10:30.641
0500: Mitsubishi Lancer EX 1800GSR IC Turbo '83, PP 374, CS, Weather at start 25%, Changeability 6, 70-74% wet, 10:27.939
0520: DMC DeLorean S2 '04, PP 401, CS, Weather at start 75%, Changeability 5, 63-70% wet, 9:51.482
0540: Lamborghini Countach LP400 '74, PP 504, SH, Weather at start 50%, Changeability 6, 60-73% wet, 10:09.057 (I)*
0600: Toyota FT-86 G Sports Concept '10, PP 472, SH, Weather at start 75%, Changeability 6, 70-100% wet, 11:14.291 (I)*
0620: Mercury Cougar XR-7 '67, PP 457, SH, Weather at start 100%, Changeability 7, 84-100% wet, 11:34.980
0640: Toyota Celica TRD Sports M (ZZT231) '00, PP 405, CS, Weather at start 0%, Changeability 8, 74-80% wet, 9:59.762
0700: Jaguar XJ13 Race Car '66, PP 589, SH, Weather at start 50%, Changeability 5, 70-74% wet, 10:19.848
*means 'race incident', or loss of control or struck barrier. A number following indicates the number of incidents in a given lap.