2018 12 Hours of Sebring explained

The 66th Mobil 1 12 Hours of Sebring Presented by Advance Auto Parts was an endurance sports car racing event held at Sebring International Raceway near Sebring, Florida from 15 to 17 March 2018. The race was the second round of the 2018 WeatherTech SportsCar Championship, as well as the second round of the North American Endurance Cup.

The race was won by Tequila Patrón ESM's Nissan Onroak DPi driven by Pipo Derani, Johannes van Overbeek, and Nicolas Lapierre, ahead of the Cadillac DPi-V.R's of Wayne Taylor Racing and Whelen Engineering Racing. Porsche took GTLM honours with Nick Tandy, Frédéric Makowiecki, and Patrick Pilet behind the wheel of their 911 RSR. The GTD category was won by Paul Miller Racing's Corey Lewis, Bryan Sellers and Madison Snow in a GT3-spec Lamborghini Huracán.

Background

International Motor Sports Association's (IMSA) president Scott Atherton confirmed the race was part of the schedule for the 2018 IMSA SportsCar Championship (IMSA SCC) in August 2017.^[1] It was the fifth consecutive year it was part of the IMSA SCC, and the 66th 12 Hours of Sebring. The 24 Hours of Daytona was the second of twelve scheduled sports car endurance races of 2018 by IMSA, and the second of four races of the North American Endurance Cup (NAEC). It was held at the 17-turn, 3.741miles Sebring International Raceway in Sebring, Florida on March 17, 2018.

On March 1, 2018, IMSA released a bulletin outlining the minimum refueling times for all the classes.^[2] All cars in the Prototype class were given 30 second minimum refueling time while GTLM and GTD were given times of 34 and 40 seconds, respectively. The times were made to override any refueling restrictor size following Montaplast by Land-Motorsport's penalty at Daytona.^[3]

After the 24 Hours of Daytona 7 weeks earlier, Filipe Albuquerque, João Barbosa, and Christian Fittipaldi were leading the Prototype Drivers' Championship with 35 points.^[4] GTLM was led by Ryan Briscoe, Richard Westbrook, and Scott Dixon with a three-point advantage over Joey Hand, Dirk Müller, and Sébastien Bourdais. In GTD, the Drivers' Championship was led by Mirko Bortolotti, Rik Breukers, Rolf Ineichen, and Franck Perera with 35 points. Cadillac, Ford, and Lamborghini were leading their respective Manufacturers' Championships, while Mustang Sampling Racing, Ford Chip Ganassi Racing, and GRT Grasser Racing Team each led their own Teams' Championships.

On March 7, 2018, IMSA released the latest technical bulletin outlining Balance of Performance for the event.^[5] In the Prototype class, the Acura ARX-05 received a reduction of turbo boost and a fuel capacity reduction of 1 liter while the Nissan Onroak DPi got a turbo boost reduction between 6000-7600 rpm. The Cadillac DPi-V.R received a 10 kilogram weight increase while the Mazda RT24-P received a fuel capacity increase of 2 liters and adjustments to the cars rear wing. In the GTLM class, the BMW M8 GTE received a 20 kilogram weight reduction and increase of power between 5000-7500 rpm while the Porsche 911 RSR got a fuel capacity increase of 2 liters. In the GTD class, the Mercedes-AMG GT3 received a 20 kilogram weight increase and a 1mm air restrictor increase while the Lexus RC F GT3 received a 1mm air restrictor increase.

Entries

A total of 43 cars took part in the event split across 3 classes. 16 cars were entered in P, 9 in GTLM, and 18 in GTD.^[6] In P, BAR1 Motorsports and Jackie Chan DCR JOTA were absent while United Autosports scaled down to 1 entry. Paul Di Resta joined Phil Hanson and Alex Brundle in the United Autosports #32 entry while Bruno Senna missed the event after having undergone a surgical procedure a few weeks earlier.^{[7] [8]} In GTD, Grasser Racing Team and Manthey Racing skipped the event while Risi Competizione scaled down focussing on its GTLM effort. CJ Wilson Racing made their IMSA SportsCar Championship debut at this event.^[9] Dillon Machavern and Markus Palttala joined Don Yount in the Turner Motorsport entry. Following the retirement of Scott Pruett, Sean Rayhall joined 3GT Racing in the teams #15 entry.^[10] Corey Lewis joined Bryan Sellers and Madison Snow in the Paul Miller Racing entry.^[11] Tom Dyer joined Ryan Eversley and Chad Gilsinger in the HART entry.^[12]

Practice

There were four practice sessions preceding the start of the race on Saturday, three on Thursday and one on Friday. The first two one-hour sessions were on Thursday morning and afternoon. The third held later that evening ran for 90 minutes; the fourth on Friday morning lasted an hour.^[13]

Practice 1

The first practice session took place at 11:00 am ET on Thursday and ended with Hélio Castroneves topping the charts for Acura Team Penske, with a lap time of 1:48.237.^[14]

	Class		Team	Driver	Time
1	P	7	Acura Team Penske		1:48.237	_
2	P	90	Spirit of Daytona Racing	Tristan Vautier	1:48.387	+0.150
3	P	10	Wayne Taylor Racing	Renger van der Zande	1:48.415	+0.178
Source:^[15]

Practice 2

The second practice session took place at 3:10 pm ET on Thursday and ended with Ricky Taylor topping the charts for Acura Team Pensken, with a lap time of 1:47.841.^[16]

	Class		Team	Driver	Time
1	P	7	Acura Team Penske	Ricky Taylor	1:47.841	_
2	P	55	Mazda Team Joest	Jonathan Bomarito	1:48.753	+0.912
3	P	5	Mustang Sampling Racing	Filipe Albuquerque	1:48.805	+0.964
Source:^[17]

Night Practice

The night practice session took place at 7:30 pm ET on Thursday and ended with René Rast topping the charts for Mazda Team Joest, with a lap time of 1:48.233.^[18]

	Class		Team	Driver	Time
1	P	77	Mazda Team Joest	René Rast	1:48.233	_
2	P	55	Mazda Team Joest		1:48.690	+0.457
3	P	31	Whelen Engineering Racing	Felipe Nasr	1:48.799	+0.566
Source:^[19]

Final Practice

The fourth and final practice session took place at 8:00 am ET on Friday and ended with Ricky Taylor topping the charts for Acura Team Penske, with a lap time of 1:47.076.^[20]

	Class		Team	Driver	Time
1	P	7	Acura Team Penske	Ricky Taylor	1:47.076	_
2	P	22	Tequila Patrón ESM	Pipo Derani	1:47.512	+0.436
3	P	38	Performance Tech Motorsports	Patricio O'Ward	1:47.861	+0.785
Source:^[21]

Qualifying

Friday afternoon's 65-minute qualifying session was divided into three groups. All three categories had 15-minute individual sessions, and regulations stipulated teams to nominate a single driver to qualify their cars. The competitors' fastest lap times determined the starting order with the grid arranged to put the Prototype and GTLM cars ahead of all GTD entries.^[22]

The first was for cars in GTD class. Daniel Serra qualified on pole for the class driving the #51 car for Spirit of Race, beating Christopher Mies in the #29 Montaplast by Land-Motorsport car by over five tenths of a second.^[23]

The second session of qualifying was for cars in the GTLM class. Connor De Phillippi qualified on pole driving the #25 car for BMW Team RLL, beating James Calado in the #62 Risi Competizione car by less than one tenth of a second.^[24]

The final session of qualifying was for the P class. Tristan Vautier qualified on pole driving the #90 car for Spirit of Daytona Racing, besting Olivier Pla in the #2 Tequila Patrón ESM entry.^[25]

Qualifying results

Pole positions in each class are indicated in bold and by .

	Class		Team	Driver	Time
1	P	90	Spirit of Daytona Racing	Tristan Vautier	1:47.432	_	1
2	P	2	Tequila Patrón ESM	Olivier Pla	1:47.592	+0.160	2
3	P	7	Acura Team Penske	Ricky Taylor	1:47.773	+0.341	3
4	P	22	Tequila Patrón ESM		1:47.834	+0.402	4
5	P	31	Whelen Engineering Racing	Felipe Nasr	1:47.853	+0.421	5
6	P	6	Acura Team Penske		1:48.177	+0.745	6
7	P	77	Mazda Team Joest	René Rast	1:48.192	+0.760	15
8	P	5	Mustang Sampling Racing		1:48.256	+0.824	7
9	P	55	Mazda Team Joest		1:48.279	+0.847	16
10	P	10	Wayne Taylor Racing		1:48.370	+0.938	8
11	P	99	JDC-Miller MotorSports		1:48.742	+1.310	9
12	P	38	Performance Tech Motorsports	Patricio O'Ward	1:49.068	+1.636	10
13	P	54	CORE Autosport		1:49.158	+1.726	11
14	P	85	JDC-Miller MotorSports		1:49.329	+1.897	12
15	P	52	AFS/PR1 Mathiasen Motorsports		1:49.423	+1.991	13
16	P	32	United Autosports		1:49.488	+2.056	14
17	GTLM	25	BMW Team RLL	Connor De Phillippi	1:55.839	+8.407	17
18	GTLM	62	Risi Competizione	James Calado	1:55.897	+8.465	18
19	GTLM	24	BMW Team RLL		1:55.985	+8.553	19
20	GTLM	67	Ford Chip Ganassi Racing	Richard Westbrook	1:56.098	+8.666	20
21	GTLM	66	Ford Chip Ganassi Racing	Joey Hand	1:56.191	+8.759	21
22	GTLM	912	Porsche GT Team	Laurens Vanthoor	1:56.251	+8.819	22
23	GTLM	3	Corvette Racing		1:56.588	+9.156	23
24	GTLM	911	Porsche GT Team	Nick Tandy	1:56.626	+9.194	24
25	GTLM	4	Corvette Racing	Tommy Milner	1:56.900	+9.468	25
26	GTD	51	Spirit of Race	Daniel Serra	1:58.710	+11.278	26
27	GTD	29	Montaplast by Land-Motorsport		1:59.229	+11.797	27
28	GTD	15	3GT Racing		1:59.251	+11.819	28
29	GTD	14	3GT Racing	Dominik Baumann	1:59.476	+12.044	29
30	GTD	48	Paul Miller Racing		1:59.489	+12.057	30
31	GTD	63	Scuderia Corsa	Gunnar Jeannette	1:59.609	+12.177	31
32	GTD	75	SunEnergy1 Racing		1:59.952	+12.520	32
33	GTD	69	HART	Tom Dyer	2:00.069	+12.637	33
34	GTD	64	Scuderia Corsa		2:00.080	+12.648	34
35	GTD	86	Michael Shank Racing with Curb Agajanian		2:00.198	+12.766	35
36	GTD	58	Wright Motorsports	Christina Nielsen	2:00.378	+12.946	36
37	GTD	36	CJ Wilson Racing		2:00.686	+13.254	37
38	GTD	71	P1 Motorsports		2:00.717	+13.285	38
39	GTD	33	Mercedes-AMG Team Riley Motorsport		2:00.743	+13.311	39
40	GTD	44	Magnus Racing		2:02.151	+14.719	40
41	GTD	96	Turner Motorsport	Dillon Machavern	2:03.227	+15.795	41
42	GTD	73	Park Place Motorsports	Tim Pappas	2:04.650	+17.218	42
43	GTD	93	Michael Shank Racing with Curb Agajanian	did not participate			43
Sources:^[26] ^[27]

• The No. 77 Mazda Team Joest entry was moved to the back of the P field after failing post qualifying technical inspection.^{[28] [29]}
• The No. 55 Mazda Team Joest entry was moved to the back of the P field failing post qualifying technical inspection.^{[30] [31]}
• The No. 32 United Autosports entry initially qualified sixteenth for the P class. However, the team changed engines after qualifying. By IMSA rules, the entry was moved to the rear of the P field on the starting grid.^[32]
• The No. 93 Michael Shank Racing with Curb Agajanian entry was moved to the back of the GTD field for starting the race with a different driver than who qualified.

Race

Start and early hours

At the start of the race at turn 1, Vautier and Pla had a collision that led to Pla needing to pit during the next lap of the race. In addition to this, both Milner and Serra both got tire punctures and also needed to pit. Around twenty minutes into the race, Saavedra spun around the final corner and was hit by Montecalvo who was flipped over following a hit to the tirewall.^[33] Just before the four hour mark, an awning blew onto the track bringing out the yellow flag. Almost immediately after the caution ended however, Brundle spun during the final turn.^[34]

Afternoon

At the beginning of the afternoon, a Lexus hit a wall which caused debris to spread onto the track. This led to a caution period which caused Derani to lose his seventeen second lead. Just after the restart, an Acura retired due to an oil pressure problem. Towards the six hour mark, Fittipaldi and Nasr were involved in a collision that sprung from Nasr diving towards Fittipaldi. The collision led to Fittipaldi being spun around but rejoining the track shortly after.^[35] Around the halfway mark, Vautier was given a drive through penalty after hitting Montoya which led to his retirement. Later, there was another collision between van der Zande and Curran which lead to tire debris being torn off and causing another yellow flag. Before the end of the afternoon, Barbosa and French had a collision that led to the two falling multiple laps behind the leader.^[36]

Sunset to finish

At the beginning of the afternoon, Bruni hit a curb which led to his diffuser landing on the track. This brought out another yellow flag however after the flag the Porsche managed to maintain third place. ^[37] Just before the end of the race, while in second, Pigot had attempted to drive between Vautier and the wall which led to him hitting debris and lose multiple places. The Mazda of Tincknell also would not engage it's clutch for a full two minutes which led to it losing a full lap to the leader. At the end of the race, the number 22 Nissan took first in the prototype class, the number 911 Porsche took first in the GTLM class, and number 48 Lamborghini took first in the GTD class.^[38]

Post-race

In Prototype, Curran, Nasr, and Conway moved to first after being second coming into Sebring. Albuquerque, Barbosa, and Fittipaldi dropped from first to third.^[39] The result kept Briscoe, Westbrook, and Dixon atop the GTLM Drivers' Championship with 63 points. Pilet, Tandy, and Makowiecki advanced from eighth to second while Hand, Müller, and Bourdais dropped from second to fourth. De Phillippi, Sims, and Auberlen moved to fifth after being ninth coming into Sebring. As a result of winning the race, Sellers and Snow took the lead of the GTD Drivers' Championship. Bleekemolen, Keating, and Stolz advanced from fourth to second while Legge, Parente, and Hindman dropped from second to third. MacNeil, Jeannette, and Balzan advanced from tenth to fourth. Cadillac, Ford, and Lamborghini continued to top their respective Manufacturers' Championships while Ford Chip Ganassi Racing kept their respective advantage in the GTLM Teams' Championship. Whelen Engineering Racing and Paul Miller Racing took the lead in their respective Teams' Championships with ten rounds left in the season.

Race Results

Class winners are denoted in bold.

!rowspan=2 Class Team Drivers Chassis Tire Time/Retired Engine 1 P 22 Tequila Patrón ESM Pipo Derani Johannes van Overbeek Nicolas Lapierre Nissan Onroak DPi 344 12:00:34.369 Nissan VR38DETT 3.8 L Turbo V6 2 P 10 Wayne Taylor Racing Jordan Taylor Renger van der Zande Ryan Hunter-Reay Cadillac DPi-V.R 344 +12.427 Cadillac 5.5 L V8 3 P 31 Whelen Engineering Racing Felipe Nasr Eric Curran Mike Conway Cadillac DPi-V.R 344 +53.075 Cadillac 5.5 L V8 4 P 54 CORE Autosport Jon Bennett Colin Braun Romain Dumas Oreca 07 344 +1:16.328 Gibson GK428 4.2 L V8 5 P 32 United Autosports Paul di Resta Alex Brundle Phil Hanson Ligier JS P217 344 +1:30.732 Gibson GK428 4.2 L V8 6 P 55 Mazda Team Joest Jonathan Bomarito Harry Tincknell Spencer Pigot Mazda RT24-P 343 +1 Laps Mazda MZ-2.0T 2.0L Turbo I4 7 P 99 JDC-Miller MotorSports Mikhail Goikhberg Stephen Simpson Chris Miller Oreca 07 338 +6 Laps Gibson GK428 4.2 L V8 8 P 77 Mazda Team Joest Oliver Jarvis Tristan Nunez René Rast Mazda RT24-P 334 +10 Laps Mazda MZ-2.0T 2.0L Turbo I4 9 P 85 JDC-Miller MotorSports Robert Alon Simon Trummer Nelson Panciatici Oreca 07 331 +13 Laps Gibson GK428 4.2 L V8 10 GTLM 911 Porsche GT Team Patrick Pilet Nick Tandy Frédéric Makowiecki Porsche 911 RSR 328 +16 Laps Porsche 4.0 L Flat-6 11 GTLM 25 BMW Team RLL Connor De Phillippi Bill Auberlen Alexander Sims BMW M8 GTE 328 +16 Laps BMW S63 4.0 L Turbo V8 12 GTLM 912 Porsche GT Team Earl Bamber Laurens Vanthoor Gianmaria Bruni Porsche 911 RSR 328 +16 Laps Porsche 4.0 L Flat-6 13 GTLM 67 Ford Chip Ganassi Racing Ryan Briscoe Richard Westbrook Scott Dixon Ford GT 328 +16 Laps Ford EcoBoost 3.5 L Turbo V6 14 GTLM 62 Risi Competizione James Calado Alessandro Pier Guidi Toni Vilander Ferrari 488 GTE 328 +16 Laps Ferrari F154CB 3.9 L Turbo V8 15 GTLM 4 Corvette Racing Oliver Gavin Tommy Milner Marcel Fässler Chevrolet Corvette C7.R 327 +17 Laps Chevrolet LT5.5 5.5 L V8 16 P 5 Mustang Sampling Racing Filipe Albuquerque João Barbosa Christian Fittipaldi Cadillac DPi-V.R 324 +20 Laps Cadillac 5.5 L V8 17 GTD 48 Paul Miller Racing Bryan Sellers Madison Snow Corey Lewis Lamborghini Huracán GT3 321 +23 Laps Lamborghini 5.2 L V10 18 GTD 63 Scuderia Corsa Alessandro Balzan Cooper MacNeil Gunnar Jeannette Ferrari 488 GT3 321 +23 Laps Ferrari F154CB 3.9 L Turbo V8 19 GTD 33 Mercedes-AMG Team Riley Motorsport Jeroen Bleekemolen Ben Keating Luca Stolz Mercedes-AMG GT3 321 +23 Laps Mercedes-AMG M159 6.2 L V8 20 GTD 29 Montaplast by Land-Motorsport Sheldon van der Linde Christopher Mies Alessio Picariello Audi R8 LMS GT3 321 +23 Laps Audi 5.2L V10 21 GTD 15 3GT Racing Jack Hawksworth David Heinemeier Hansson Sean Rayhall Lexus RC F GT3 321 +23 Laps Lexus 5.0L V8 22 GTD 58 Wright Motorsports Patrick Long Christina Nielsen Mathieu Jaminet Robert Renauer Porsche 911 GT3 R 321 +23 Laps Porsche 4.0 L Flat-6 23 GTD 93 Michael Shank Racing with Curb Agajanian Mario Farnbacher Justin Marks Lawson Aschenbach Acura NSX GT3 321 +23 Laps Acura 3.5 L Turbo V6 24 GTD 86 Michael Shank Racing with Curb Agajanian Katherine Legge Álvaro Parente Trent Hindman Acura NSX GT3 321 +23 Laps Acura 3.5 L Turbo V6 25 GTD 73 Park Place Motorsports Jörg Bergmeister Patrick Lindsey Tim Pappas Porsche 911 GT3 R 321 +23 Laps Porsche 4.0 L Flat-6 26 GTD 75 SunEnergy1 Racing Kenny Habul Thomas Jäger Mikaël Grenier Mercedes-AMG GT3 321 +23 Laps Mercedes-AMG M159 6.2 L V8 27 GTD 96 Turner Motorsport Don Yount Dillon Machavern Markus Palttala BMW M6 GT3 320 +24 Laps BMW 4.4 L Turbo V8 28 GTD 51 Spirit of Race Paul Dalla Lana Pedro Lamy Mathias Lauda Daniel Serra Ferrari 488 GT3 320 +24 Laps Ferrari F154CB 3.9 L Turbo V8 29 GTD 44 Magnus Racing John Potter Andy Lally Andrew Davis Audi R8 LMS GT3 319 +25 Laps Audi 5.2L V10 30 GTD 14 3GT Racing Dominik Baumann Kyle Marcelli Phillipp Frommenwiler Lexus RC F GT3 316 +28 Laps Lexus 5.0L V8 31 P 52 AFS/PR1 Mathiasen Motorsports Sebastián Saavedra Gustavo Yacamán Roberto González Ligier JS P217 315 +29 Laps Gibson GK428 4.2 L V8 32 GTD 69 HART Ryan Eversley Chad Gilsinger Tom Dyer Acura NSX GT3 312 +32 Laps Acura 3.5 L Turbo V6 33 GTD 36 CJ Wilson Racing Marc Miller Till Bechtolsheimer Kuno Wittmer Acura NSX GT3 309 +35 laps Acura 3.5 L Turbo V6 34DNF GTLM 24 BMW Team RLL John Edwards Jesse Krohn Nick Catsburg BMW M8 GTE 296 Did Not Finish BMW S63 4.0 L Turbo V8 35DNF P 90 Spirit of Daytona Racing Eddie Cheever III Matt McMurry Tristan Vautier Cadillac DPi-V.R 294 Crash Cadillac 5.5 L V8 36 GTLM 3 Corvette Racing Antonio García Jan Magnussen Mike Rockenfeller Chevrolet Corvette C7.R 283 +61 laps Chevrolet LT5.5 5.5 L V8 37DNF GTLM 66 Ford Chip Ganassi Racing Joey Hand Dirk Müller Sébastien Bourdais Ford GT 277 Did Not Finish Ford EcoBoost 3.5 L Turbo V6 38DNF P 38 Performance Tech Motorsports James French Kyle Masson Patricio O'Ward Oreca 07 276 Did Not Finish Gibson GK428 4.2 L V8 39DNF P 6 Acura Team Penske Dane Cameron Juan Pablo Montoya Simon Pagenaud Acura ARX-05 203 Lost Power Acura AR35TT 3.5 L Turbo V6 40DNF P 7 Acura Team Penske Hélio Castroneves Ricky Taylor Graham Rahal Acura ARX-05 172 Engine Acura AR35TT 3.5 L Turbo V6 41DNF GTD 64 Scuderia Corsa Townsend Bell Frankie Montecalvo Bill Sweedler Ferrari 488 GT3 9 Crash Ferrari F154CB 3.9 L Turbo V8 42 GTD 71 P1 Motorsports Kenton Koch JC Perez Loris Spinelli Mercedes-AMG GT3 316 +28 laps Mercedes-AMG M159 6.2 L V8 43DNS P 2 Tequila Patrón ESM Ryan Dalziel Scott Sharp Olivier Pla Nissan Onroak DPi – Did Not Start Nissan VR38DETT 3.8 L Turbo V6 Sources:^[40] ^[41]

Key Symbol Tyre manufacturer Continental Michelin

Standings after the race

+Prototype Drivers' Championship standings		+/–	Driver	Points
1	1		62
2	1	Jon Bennett Colin Braun Romain Dumas	58
3	2		56
4		Paul di Resta	54
5		Alex Brundle	52

+GTLM Drivers' Championship standings		+/–	Driver	Points
1		Ryan Briscoe Scott Dixon Richard Westbrook	63
2	6	Patrick Pilet Nick Tandy Frédéric Makowiecki	58
3	1	Earl Bamber Laurens Vanthoor Gianmaria Bruni	55
4	2	Sébastien Bourdais Joey Hand Dirk Müller	54
5	4	Connor De Phillippi Alexander Sims Bill Auberlen	54

+GTD Drivers' Championship standings		+/–	Driver	Points
1	2	Bryan Sellers Madison Snow	65
2	2	Jeroen Bleekemolen Ben Keating Luca Stolz	58
3	1	Katherine Legge Álvaro Parente Trent Hindman	55
4	6	Cooper MacNeil Gunnar Jeannette Alessandro Balzan	53
5	2	Sheldon van der Linde Christopher Mies	52

• Note: Only the top five positions are included for all sets of standings.

+Prototype Teams' Championship standings		+/–	Team	Points
1	1	No. 31 Whelen Engineering Racing	62
2	1	No. 54 CORE Autosport	58
3	2	No. 5 Mustang Sampling Racing	56
4		No. 32 United Autosports	54
5	13	No. 22 Tequila Patrón ESM	48

+GTLM Teams' Championship standings		+/–	Team	Points
1		No. 67 Ford Chip Ganassi Racing	63
2	2	No. 911 Porsche GT Team	58
3	2	No. 912 Porsche GT Team	55
4	2	No. 66 Ford Chip Ganassi Racing	54
5	4	No. 25 BMW Team RLL	54

+GTD Teams' Championship standings		+/–	Team	Points
1	2	No. 48 Paul Miller Racing	65
2	2	No. 33 Mercedes-AMG Team Riley Motorsports	58
3	1	No. 86 Michael Shank Racing with Curb-Agajanian	55
4	6	No. 63 Scuderia Corsa	53
5	2	No. 29 Montaplast by Land-Motorsport	52

• Note: Only the top five positions are included for all sets of standings.

+Prototype Manufacturers' Championship standings		+/–	Manufacturer	Points
1		Cadillac	67
2	2	Nissan	63
3	1	Acura	60
4	1	Mazda	60

+GTLM Manufacturers' Championship standings		+/–	Manufacturer	Points
1		Ford	65
2	2	Porsche	63
3	1	Chevrolet	58
4	1	BMW	58
5	2	Ferrari	58

+GTD Manufacturers' Championship standings		+/–	Manufacturer	Points
1		Lamborghini	70
2	2	Ferrari	60
3		Mercedes-AMG	60
4	2	Acura	56
5		Audi	54

• Note: Only the top five positions are included for all sets of standings.

Notes and References

1. Web site: Goodwin . Graham . August 6, 2017 . IMSA Announce 2018 Calendar . live . https://web.archive.org/web/20180612072441/http://www.dailysportscar.com/2017/08/06/imsa-announce-2018-calendar.html . June 12, 2018 . July 25, 2023 . DailySportsCar.
2. Web site: Dagys . John . March 1, 2018 . IMSA Establishes Minimum Refueling Times . May 2, 2023 . sportscar365.com.
3. Web site: Dagys . John . February 6, 2018 . Land Explains Daytona Refueling BoP Penalty . May 2, 2023 . sportscar365.com.
4. Web site: January 30, 2018 . 00_Championship Points - Official.pdf . dead . https://web.archive.org/web/20231114022950/http://results.imsa.com/Results/18_2018/03_Daytona%20International%20Speedway/01_IMSA%20WeatherTech%20SportsCar%20Championship/00_Championship%20Points%20-%20Official.pdf . 14 November 2023 . July 25, 2023 . results.imsa.com.
5. Web site: Dagys . John . March 7, 2018 . DPis Slowed in Pre-Sebring BoP Adjustments . May 2, 2023 . sportscar365.com.
6. Web site: Dagys . John . March 7, 2018 . 43 Entries for Sebring . May 2, 2023 . sportscar365.com.
7. Web site: Kilshaw . Jake . February 15, 2018 . Di Resta Set for Sebring, Watkins Glen with United Autosports . May 2, 2023 . sportscar365.com.
8. Web site: Dagys . John . March 8, 2018 . Senna Ruled Out of 12H Sebring . May 2, 2023 . sportscar365.com.
9. Web site: Lopez . David . February 21, 2018 . CJ Wilson Racing to enter Sebring with Acura NSX . May 2, 2023 . us.motorsport.com.
10. Web site: Dagys . John . February 19, 2018 . Rayhall Joins 3GT for Sebring, Petit Le Mans . May 2, 2023 . sportscar365.com.
11. Web site: Dagys . John . January 16, 2018 . Lewis Confirmed at Paul Miller for Sebring . May 2, 2023 . sportscar365.com.
12. Web site: Dagys . John . February 14, 2018 . Dyer Joins HART for Sebring . May 2, 2023 . sportscar365.com.
13. Web site: March 14, 2018 . Continental Tire Keys to the Race: 12H Sebring . July 24, 2023 . sportscar365.com.
14. Web site: Dagys . John . March 15, 2018 . Castroneves Tops Opening Practice at Sebring . May 4, 2023 . sportscar365.com.
15. Web site: March 15, 2018 . 03_Results.PDF . May 4, 2023 . results.imsa.com.
16. Web site: Dagys . John . March 15, 2018 . Penske Acura Quickest Again; Marks Crash Ends Session Early . May 4, 2023 . sportscar365.com . John Dagys Media.
17. Web site: March 15, 2018 . 03_Results.PDF . May 4, 2023 . results.imsa.com.
18. Web site: Myrehn . Ryan . March 15, 2018 . Rast Leads Mazda 1-2 in Sebring Night Practice . May 4, 2023 . sportscar365.com.
19. Web site: March 15, 2018 . 03_Results.PDF . May 4, 2023 . results.imsa.com.
20. Web site: Myrehn . Ryan . March 16, 2018 . Penske Back on Top in Practice 4 . May 4, 2023 . sportscar365.com . John Dagys Media.
21. Web site: March 16, 2018 . 03_Results.PDF . May 4, 2023 . results.imsa.com.
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