Extended Idle Time?
Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
Extended Idle Time?
Due to extenuating circumstances... I have a situation where I am sitting in my car, parked, with the AC on for about 1-1.5 hours at a time. I won't be able to drive anywhere during this time.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
Last edited by Enderthex; Apr 25, 2022 at 12:53 PM.
Racer
Joined: Dec 2021
Posts: 451
Likes: 338
Due to extenuating circumstances... I have a situation where I am sitting in my car, parked, with the AC on for about 1-1.5 hours at a time. I won't be able to drive anywhere during this time.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
Will you have any short term issues? Probably not. Would I find another way? Yeah.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,010
Likes: 12,396
From: NE South Carolina
Due to extenuating circumstances... I have a situation where I am sitting in my car, parked, with the AC on for about 1-1.5 hours at a time. I won't be able to drive anywhere during this time.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
This may occur about two times a week and may occur during the 100+ deg Texas summer.
So far when I've done this with my truck there are no signs of stress or other issues, seems to handle it easily.
Is there anything I should be concerned about with the C8?
Not sure if it makes a difference but I have a Z51 Coupe.
Just found this:
One of the newer GM safety features is Extended Parking, which automatically shuts off a vehicle’s engine after a certain period of time while the vehicle is parked. The goal of the feature is to reduce emissions and prevent potential carbon monoxide poisoning in an enclosed space. However, some owners might wish to disable Extended Parking, thereby preventing a GM vehicle from shutting off the engine when parked.
The GM Extended Parking feature automatically shuts off the engine when the vehicle is parked for 20 minutes and the key fob is not present, or after an hour when the key fob is present.
Disabling the feature is accomplished by pressing and holding the engine/vehicle start button until the driver information center displays the message “automatic shutdown off.”
This doesn’t work on all GM vehicles, but more so on the newer ones, especially those running the automaker’s new Global B electronic architecture which first debuted on the 2020 Cadillac CT5, followed by the 2020 Cadillac CT4, Chevy Corvette C8, 2021 Buick Envision, and the 2021 Chevy Tahoe, 2021 Suburban, 2021 GMC Yukon and 2021 Cadillac Escalade.
PS: Just checked the Owner's Manual and the only issues I found related to "automatic shut-off" were under remote start. It says shuts off in 10 minutes if you remote start. i never use that. It says nothing about shutting that feature off!
Last edited by JerryU; Apr 25, 2022 at 01:21 PM.
Formula 1
Joined: May 2014
Posts: 591
Likes: 236
From: Washington
I really wouldn’t be concerned with new cars:; other than fuel burned and the emissions. Just keep eye temp gauge.
Police cars and car services run idle for many hours a day, at times. Many have well over 100K miles.
Police cars and car services run idle for many hours a day, at times. Many have well over 100K miles.
Last edited by Spitfire Mk1; Apr 25, 2022 at 02:12 PM.
Le Mans Master
Joined: Aug 2000
Posts: 5,529
Likes: 1,943
From: Austin Texas
Why are YOU constrained to remain in the car while waiting ?
Could you get out and wait in an air conditioned room, office, store, restaurant ?
It is probably costing you $4-$5 to sit there idling for 1-1½ hours.
Perhaps you could go to a local bar for the duration........and brake even money wise.
Could you get out and wait in an air conditioned room, office, store, restaurant ?
It is probably costing you $4-$5 to sit there idling for 1-1½ hours.
Perhaps you could go to a local bar for the duration........and brake even money wise.
Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
Why are YOU constrained to remain in the car while waiting ?
Could you get out and wait in an air conditioned room, office, store, restaurant ?
It is probably costing you $4-$5 to sit there idling for 1-1½ hours.
Perhaps you could go to a local bar for the duration........and brake even money wise.
Could you get out and wait in an air conditioned room, office, store, restaurant ?
It is probably costing you $4-$5 to sit there idling for 1-1½ hours.
Perhaps you could go to a local bar for the duration........and brake even money wise.
Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
My truck seems to handle it easily (Tundra V8) but I wonder if the C8 has other heat issues while not moving.
Burning Brakes
Joined: Sep 2021
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From: Cincinnati
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Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,414
From: Florida
Extended idling is considered severe duty. Check the owners manual. Any owners manual in any modern car will at the very least half the oil change interval on severe duty. As an example one of my other cars has a 10k mile OCI but states oil must be changed at 4k miles under severe duty which includes extended idling.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX
Extended idling is considered severe duty. Check the owners manual. Any owners manual in any modern car will at the very least half the oil change interval on severe duty. As an example one of my other cars has a 10k mile OCI but states oil must be changed at 4k miles under severe duty which includes extended idling.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
Luckily I haven't put my C8 through this torture yet... I do want it to last until the next gen comes out and then I would like to see it go to someone who can still enjoy it.. I should have well over 100k miles by then.
Moderator
Joined: Feb 2006
Posts: 39,134
Likes: 17,985
From: DFW Area TX
From the Owners Manual:
The Additional Required Services -
Severe are for vehicles that are:
. Mainly driven in heavy city traffic
in hot weather.
. Mainly driven in hilly or
mountainous terrain.
. Used for high speed or
competitive driving.
. Used for taxi, police, or delivery
service.
Severe are for vehicles that are:
. Mainly driven in heavy city traffic
in hot weather.
. Mainly driven in hilly or
mountainous terrain.
. Used for high speed or
competitive driving.
. Used for taxi, police, or delivery
service.
Race Director
Joined: Apr 2017
Posts: 13,602
Likes: 12,865
From: Virginia
Race Director
Joined: Aug 2016
Posts: 12,812
Likes: 10,229
From: Garden Valley CA
Extended idling is considered severe duty. Check the owners manual. Any owners manual in any modern car will at the very least half the oil change interval on severe duty. As an example one of my other cars has a 10k mile OCI but states oil must be changed at 4k miles under severe duty which includes extended idling.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
Your car idling is sitting there with no significant load on the rings with fuel being injected right into the cylinders washing down the oil film. Modem cars are actually LESS tolerant of this as we use direct injection that does a great job of wetting the cylinder.
This is not to mention the lack of airflow over any and all of the heat exchangers.
This is why all police cruisers get upgraded cooling sytems. They also tend to ditch their cars right about when the engines need replacement at the 100k mark.
Id personally find another car for that duty. If for some reason you cant id do 3k to 4k mile oil changes or at least oil analysis to look at fuel dilution.
I've had to idle for 1/2 hour on a hot day (road work on a 2 lane highway) and there was no indications the car was close to overheating. A message will come up on the display that the engine is going to shut off in so many minutes but if you press the brake pedal or provide other input it will continue to idle.
Obviously it would be better for various reasons not to let the car idle but it shouldn't cause damage.
Moderator
Joined: Feb 2006
Posts: 39,134
Likes: 17,985
From: DFW Area TX
I wouldn't be that concerned about damage to the engine during idle. As mentioned, there are lot of situations that extended idle periods are part of the duty cycle. Depending on where you live, a lot of idling may be part of your daily commute. And the OLM will keep track of any reduced oil life. There isn't even a severe duty service schedule in the C8 owners manual, just extra maintenance for track use. And the OP has a Z51 so it has more than enough cooling.
I've had to idle for 1/2 hour on a hot day (road work on a 2 lane highway) and there was no indications the car was close to overheating. A message will come up on the display that the engine is going to shut off in so many minutes but if you press the brake pedal or provide other input it will continue to idle.
Obviously it would be better for various reasons not to let the car idle but it shouldn't cause damage.
I've had to idle for 1/2 hour on a hot day (road work on a 2 lane highway) and there was no indications the car was close to overheating. A message will come up on the display that the engine is going to shut off in so many minutes but if you press the brake pedal or provide other input it will continue to idle.
Obviously it would be better for various reasons not to let the car idle but it shouldn't cause damage.
Also, page 292 has this:
The Additional Required Services- Severe are for vehicles that are:
. Mainly driven in heavy city traffic in hot weather.
. Mainly driven in hilly or mountainous terrain.
. Used for high speed or competitive driving.
. Used for taxi, police, or delivery service.
Refer to the information in the Maintenance Schedule Additional Required Services Severe chart.
. Mainly driven in heavy city traffic in hot weather.
. Mainly driven in hilly or mountainous terrain.
. Used for high speed or competitive driving.
. Used for taxi, police, or delivery service.
Refer to the information in the Maintenance Schedule Additional Required Services Severe chart.
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,414
From: Florida
I wouldn't be that concerned about damage to the engine during idle. As mentioned, there are lot of situations that extended idle periods are part of the duty cycle. Depending on where you live, a lot of idling may be part of your daily commute. And the OLM will keep track of any reduced oil life. There isn't even a severe duty service schedule in the C8 owners manual, just extra maintenance for track use. And the OP has a Z51 so it has more than enough cooling.
I've had to idle for 1/2 hour on a hot day (road work on a 2 lane highway) and there was no indications the car was close to overheating. A message will come up on the display that the engine is going to shut off in so many minutes but if you press the brake pedal or provide other input it will continue to idle.
Obviously it would be better for various reasons not to let the car idle but it shouldn't cause damage.
I've had to idle for 1/2 hour on a hot day (road work on a 2 lane highway) and there was no indications the car was close to overheating. A message will come up on the display that the engine is going to shut off in so many minutes but if you press the brake pedal or provide other input it will continue to idle.
Obviously it would be better for various reasons not to let the car idle but it shouldn't cause damage.
But Yolo so by all means. It has a warranty so why not
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,414
From: Florida
Logic dictates this is the most correct and relevant information to my situation. Thanks. I've known of the modifications to severe duty vehicles but maybe I was hoping it wouldn't be as necessary with new engines. Likely wishful thinking, quite unfortunate for me.
Luckily I haven't put my C8 through this torture yet... I do want it to last until the next gen comes out and then I would like to see it go to someone who can still enjoy it.. I should have well over 100k miles by then.
Luckily I haven't put my C8 through this torture yet... I do want it to last until the next gen comes out and then I would like to see it go to someone who can still enjoy it.. I should have well over 100k miles by then.
Heck thats the reason i got the c8. If you do pop the engine or transmission or whatever its not the end of the world even outside of warranty. A McLaren on the other hand...
Race Director
Joined: Aug 2016
Posts: 12,812
Likes: 10,229
From: Garden Valley CA
Well, yes, technically there is, but there is no difference in required maintenance between the two schedules. At least I couldn't find a difference but perhaps I missed it. I noticed this when I was reading the manual before I had my car. Probably a boilerplate section.
Thread Starter
Racer
Joined: Jan 2022
Posts: 351
Likes: 221
From: DFW, TX