Every GM, Hyundai/Kia, Subaru, or Toyota I've driven in the last 5ish years restarted it every trip and I am not a fan. I'd say any company that retains your last setting is the more uncommon practice.
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Does 2024 maverick still turn "auto stop/start" back on?
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The engine idle start-stop is part of the government’s greenhouse gas credit scheme for automobiles. For more info look up the CFR (Code or Federal Regulations) § 86.1869-12 CO2 credits for off-cycle CO2 reducing technologies. It is exciting reading.
It will explain among other things why car manufacturers do some of the things that frustrates a car enthusiast and/or an engineer like me.
Among other things it readily admits that the technologies that they want, including the engine idle start-stop, do not actually help gas mileage but is intended to reduce CO2 emissions. (Whether CO2 is the vehicle for the end of the world and reduced CO2 emissions is a going to save us all or not is a debate I will try to ignore for this post.)
“Manufacturers may generate credits for CO2-reducing technologies where the CO2 reduction benefit of the technology is not adequately captured on the Federal Test Procedure and/or the Highway Fuel Economy Test such that the technology would not be otherwise installed for purposes of reducing emissions (directly or indirectly) over those test cycles for compliance with the GHG standards.”
Reading through the exciting text of the CFR you will eventually get to this gem of text that states the “engine start-stop is the predominant operating mode for that vehicle.”
"(iii) Engine idle start-stop means a technology which enables a vehicle to automatically turn off the engine when the vehicle comes to a rest and restarts the engine when the driver applies pressure to the accelerator or releases the brake. Off-cycle engine start-stop credits will only be allowed for a vehicle if the Administrator has made a determination under the testing and calculation provisions in 40 CFR Part 600 that engine start-stop is the predominant operating mode for that vehicle."
In other words, if a manufacturer wants that juicy Greenhouse Gas Credit for the cars they make, make sure the Auto Stop Start system defaults back to being on when the car is restarted.
So while your older cars may have been able to push the Auto Start stop button and it stays disabled until you turn it back on - newer cars, wanting the big government GHG credits, will not stay disable any more.
It will explain among other things why car manufacturers do some of the things that frustrates a car enthusiast and/or an engineer like me.
Among other things it readily admits that the technologies that they want, including the engine idle start-stop, do not actually help gas mileage but is intended to reduce CO2 emissions. (Whether CO2 is the vehicle for the end of the world and reduced CO2 emissions is a going to save us all or not is a debate I will try to ignore for this post.)
“Manufacturers may generate credits for CO2-reducing technologies where the CO2 reduction benefit of the technology is not adequately captured on the Federal Test Procedure and/or the Highway Fuel Economy Test such that the technology would not be otherwise installed for purposes of reducing emissions (directly or indirectly) over those test cycles for compliance with the GHG standards.”
Reading through the exciting text of the CFR you will eventually get to this gem of text that states the “engine start-stop is the predominant operating mode for that vehicle.”
"(iii) Engine idle start-stop means a technology which enables a vehicle to automatically turn off the engine when the vehicle comes to a rest and restarts the engine when the driver applies pressure to the accelerator or releases the brake. Off-cycle engine start-stop credits will only be allowed for a vehicle if the Administrator has made a determination under the testing and calculation provisions in 40 CFR Part 600 that engine start-stop is the predominant operating mode for that vehicle."
In other words, if a manufacturer wants that juicy Greenhouse Gas Credit for the cars they make, make sure the Auto Stop Start system defaults back to being on when the car is restarted.
So while your older cars may have been able to push the Auto Start stop button and it stays disabled until you turn it back on - newer cars, wanting the big government GHG credits, will not stay disable any more.
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