It’s been teased. It’s been hyped. And now it’s finally here. It is time for the fourth Oppositelock Endurance Championship. And this year, we return to GT cars for the first time since 2014. In this post, I have all of the specifics, including time and eligible cars, for this race. You can also begin to sign up for the race in this post.

As with past races and series, this race is certainly not a place for overly competitive racing or extremely aggressive racing. If you’re spending hours tuning your car weeks before a race you’re doing it wrong. If you’re racing purely to win you’re doing it wrong. Just have fun with it. People race in cars sponsored by Doug Dimmadome, finish the race in reverse, and do impromptu Le Mans starts. We’re pretty chill and just talk about cars and banter a lot of the time. That doesn’t stop us from having some great racing, though.


It is open to anyone and everyone. It doesn’t matter how good or bad you are at the game. We have people of all skill levels regularly race with us. It results in some great racing, too. These whole series, especially the endurance races, are some of the most fun I’ve ever had in Forza. Here are some pics from the previous series showing the action.



This series will mimic the races of the Creventic 24H Series. Cars were selected from those events that actually raced, as close of a substitution as I could get, or other cars I thought would be fun to race. Each race will be three hours in length. At the start of the actual race, there will be a formation lap. Yellow flag and caution rules will also be in effect.


They will be handled the same way as any of our other races. Drive like you are in an actual race, and not an online public matchmaking lobby, and you will be fine. If you are new to racing with us or need a refresher, take a look at SVTyler’s post on driving etiquette. This will give you a general idea of what to expect. I also have my own rules outlined later in this post.

Also, instead of using parties or gamechat, we are going to be using an app called Discord to communicate during the races. It is available for free on any desktop or mobile OS. Please join the Discord server even if you don’t have a mic, that way you can still hear everyone else. Or just join it for the dank shitposting. If for some reason we are not using the app or it fails, we will be using gamechat to communicate, and hoping for the best.





Here is the current schedule for the races. These months and/or dates are subject to change pending my own or others schedules. I will make everyone aware of any changes of that nature. Unlike previous seasons, there will be no date voting and I will pick the dates of races based on what I view as most appropriate. Race weather will be decided by real world conditions when possible. Otherwise, assume the race will be held in standard conditions. Unless I decide otherwise...


February 29th, 8:00 PM EST: Yas Marina Full (Night); 3 Hours


May TBD, 8:00 PM EDT: Mugello Full (Day); 3 Hours


July TBD, 8:00 PM EDT: Spa-Francorchamps (TBD); 3 Hours


August TBD, 8:00 PM EDT: Nurburgring GP Circuit (TBD); 3 Hours


September TBD, 8:00 PM EDT: Catalunya Full (Day); 3 Hours


November TBD, 8:00 PM EST: COTA Full (TBD); 3 Hours




  • We will be racing GT3, GT4, TCR, SPX, and other race cars for this series broken into 3 classes: SP1, SP2, and SP3.
  • In the event that there are more than 24 racers, people may volunteer to opt out, or the drivers will be chosen based on sign up order and/or how often they race with Oppo
  • There will be a set build for each car that you must match
  • Races will use a lap counter, but the race end will be determined by time elapsed and not laps completed
  • Damage will be set to simulation
  • Collisions will be set to always on
  • All assists (minus friction and collision assist) are allowed
  • ALL DRIVERS MUST BE ON DISCORD FOR THE RACE. You do not need to talk, but you need to hear what is being said.
  • Pit lane is always open no matter what.
  • Forza Race Regs will be used in order to get rid of tire walls.


  • The race lobby will be opened 10-20 minutes before the race
  • The earlier you are online the better
  • Once in the lobby, please do not leave if you intend to race


  • Seriously it’s 3 hour races qualifying is near meaningless
  • Grid will be sorted randomly by class

Race Start

  • After the grid is set and all players have readied up, the race will be loaded
  • There will be a formation lap, with cars single file at 80 mph
  • If there is a disconnect or a game glitch during the formation lap, a lobby restart may occur if the disconnected driver(s) request it. This may only be done a maximum of two times unless there are extreme circumstances.
  • If a driver leaves the controller but does not disconnect during the formation lap, the formation lap will continue without them. If they are parked at a dangerous point on track, the formation lap will continue until they return. Note that deliberately parking in a bad spot will result in a penalty.
  • Once cars reach the final turn, they will form up two by two
  • Class leaders have pick over which side of the track they get
  • The race start is for each individual car when they reach the start/finish line

In Race Etiquette

  • Lower class cars have the absolute right to hold and use the racing line when a higher class is approaching/passing, if they decide to do so
  • It is VERY HIGHLY ENCOURAGED that drivers communicate during passes
  • If you are in a higher class and stuck behind lower class traffic, be patient and do not force your way through, and DO NOT DIVE BOMB GT CARS. 
  • The only thing that will happen if you try and weave through several side by side cars is a crash. Just in general, do not try a high risk maneuver. Be patient and let passing opportunities create themselves.
  • Refer to cautions as “be carefuls” unless a caution actually needs to be called
  • If the phrase “race control” is called, all drivers will be silent apart from the person who said it. This is to be used for serious questions or concerns
  • Do not discuss the events of a caution or race incident until after the race unless told otherwise
  • There are no blue flag rules, but excessively holding up cars while a lap down is frowned upon.
  • Be careful when exiting pit road as to avoid oncoming traffic, fast or slow moving. USE THE BLEND LINES WHEN POSSIBLE.
  • It is expected that all drivers will follow and obey track limits.
  • General rule is 2 wheels on track at all time. Curbs are considered part of the track in the race
  • Driving backwards on the track is not permitted at any point.
  • TL/DR: Don’t be a dick


  • Credit for the original rules goes to r/redditracing, as I’ve only made minor changes.
  • For a caution to be called, a TWO CAR wreck must have occurred with at least one car HAVING SUFFERED DAMAGE in which cars either spin, flip, take significant damage, or lose serious time off track.
  • One of the involved drivers and/or a witnessing driver must call the caution. 
  • When a caution is called, the race leader should slow to 60 mph IMMEDIATELY to allow the field to catch up 
  • The race leader will also assume the role of pace car unless there is a pace car present in the race.
  • There is no passing under caution with one exception. Any and all cars that are not on the lead lap may make ONE lap up under yellow. However, they may not pit to repair damage if they take the free pass, and they may not pass for position while doing this.
  • There is also no guarantee that a free pass car(s) will catch the tail end of the field before green.
  • The pits will remain open for the full duration of the caution.
  • Restarts will be single file at the start finish line unless otherwise specified.
  • There is a 5 minute cool down period after a caution where another caution cannot be called. If there is an incident involving a large amount of vehicles during this time, this can be overruled.
  • Once there are less than 10 minutes left in the race, no cautions can be called.

Race End

  • All drivers will continue racing until the total race time is completed (3 hours)
  • Once the the total race time is reached, the overall leader will call white flag (final lap)
  • All cars will continue racing and completing laps during this time
  • Once the overall leader crosses the line after white flag is called, they will call checkered flag, the race will be over, and they will park in turn 1
  • After checkered flag is called, all cars will finish the lap they are on and also park in turn 1
  • Cars cannot be in pit lane when they take the checkered flag.
  • Once parked, all cars will remain stationary while results are collected.
  • Once results are collected, the remaining laps will be completed. Drivers may choose to leave at this point

Post Race

  • Any in race cautions or incidents can be discussed
  • If you feel an incident needs investigated, DM me what happened with relevant clips and I will address it
  • Replays will be uploaded by myself and/or others
  • Any drivers may stick around for more racing if they desire


Listed below are the cars that are eligible for both classes as well as their respective build rules. If it is not listed, it is not eligible for the race. However, if you think I forgot a car or want to plead a car’s case, fill out the waiver request form. There are so many different cars that have or could race in Creventic, that I’m sure more cars could be added. Just try to keep my sanity in mind...


Some Other Important Notes

  • I have tested and will be testing all of the cars extensively to make sure they are as even as possible. In addition, I will keep testing them up until race day to make sure there weren’t any inconsistencies in my original testing.
  • The build rules for any and every car are not 100% set in stone and may be changed at any point for re-balancing of the field. Do not expect changes the week of the race unless there is a major issue.
  • Custom rims are allowed on all cars so long as some rules are followed. Due to the build rules, the rims cannot change the PI of the car. For example, if the PI is R834, the PI must stay that way after the rims are added.
  • SWAPPING CARS IS ALLOWED AND ENCOURAGED. However, I have some rules in place to make sure this isn’t abused. If you swap to a new car that is in the same class as your previous one, you must wait two rounds before you can swap cars again. However, if you swap to a car in a different class (i.e. swapping from a SP1 car to a SP2 car) there is no wait period and you can immediately swap again.
  • Special thanks to everyone who has helped test cars for this series.



For the first time ever in OEC, I am actually having genuine livery rules with required logos and number panels. To make the field more diverse and for better pictures, custom made paint jobs and unique numbers for each driver are highly encouraged. While all cars should have a race number, it may be too difficult to organize everyone having their own number, but try and give your car a unique paint job to help it stand out. The specific rules for liveries are listed below.

  • Wwaveform has made number boards for this series. There are specific ones for each class. They are required on the left and right side of the car as well as on the hood or roof.
  • Hankook tire logos are required on the left and right side of the front and rear bumpers. Front and rear quarter panel placement is also acceptable. No other tire manufactures are permitted in place of Hankook.
  • Photos showing logo/panel placements are shown below as an example.
  • Team liveries are allowed and encouraged, though try to keep a consistent car manufacture. A max of 3 matching liveries per “team” are allowed.
  • I am legally required to say don’t break Xbox Terms of Service with your livery. However, my general rule is anything goes that is not sexually explicit or overly offensive. Therefore, tobacco and alcohol sponsorship are allowed. Though if you get banned by Xbox, don’t say I didn’t warn you.


I’m trying something new for this series where I have a dedicated form for submitting requests for car additions and BoP changes, among other things. Provide SUFFICIENT REASON and EVIDENCE, and I may make changes/additions based on your request. Please keep in mind though that submitting a waiver request is not a guarantee that action will be taken. I know shitposting is popular around these parts, but please use this for serious purposes only. In addition, please DM me if you fill out this form to make sure I see it.






  • There will be three main points championships for SP1, SP2, and SP3
  • In this case, all sub classes (i.e. TCR and GT4) within each main class (i.e. SP2) will compete on the same points scale against each other
  • Each sub class will also have it’s own separate points championship
  • In this case, cars will only be scored against other cars in their class
  • This will not affect the other championships
  • Each championship has one drop round


For this year, I modeled the sign up form to almost perfectly mimic the real Creventic entry form. You don’t need to fill in every single detail, but have fun with it if you want to! Either way, if you are participating in this series, please click the link below to complete the form so I can keep track of who signs up and their gamertags (the only information required is your gamertag and Oppo and/or Reddit username). YOU MUST SIGN UP SEPARATELY FOR EVERY RACE. Also, if you sign up and for whatever reason are not sent a friend request by me, feel free to send me one as well as a message indicating that you intend to join the series. My gamertag is Corey CC97. In addition, you can get in contact with SVTyler (GT: mackleroy45) or anyone on the Discord if you do not hear from me, and they will get you set up. If you do not complete the survey or get in contact with me or the other people racing somehow, there is a very good chance you will not be sent an invite to the race on raceday.




I will be posting reminders for the race frequently with links to this post. If you have questions, please leave a comment on this post or one of the reminder posts.

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