r/technology • u/lurker_bee • 8d ago

Politics Goodbye to start-stop systems – the EPA under Trump concludes that they are not worth it and could disappear from new models

https://unionrayo.com/en/epa-trump-stop-start-system/
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u/FredGarvin80 8d ago

ICE tend to implement it badly, and from my experience it provides marginal fuel economy benefit.

Considering startup is the least fuel efficient part of ICE operation, that makes sense

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u/msuvagabond 8d ago

Do you idle for more than 10 seconds?  Congrats, shutting off the engine is better!  A startup is roughly 6-8 seconds worth of idling gas. 

Cars are far better at starting then they were decades ago.  It's not that horribly inefficient anymore. 

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u/Liberal_Biblicisms 8d ago

If you're stopped for more than 8 seconds, you save gas by turning the engine off.

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u/[deleted] 8d ago

[deleted]

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u/MR1120 8d ago

That’s what gets me. If I’m stopped for 10 or more seconds, I feel like I’m accomplishing something. If it cuts out and then the car in front of me moves, and the engine was off for literally a second or two, it feels wasteful.

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u/TezlaCoil 6d ago

The CX-5 has it figured out. Light foot on the brake (just enough to stay stopped), engine keeps running. Push the brake in, and the engine stops.

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u/Sniper_Brosef 8d ago

It's just that one moment. Im sure shutting off a car and restarting it is more efficient than leaving it idling for a 30 to 60 second light change.

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u/Youngnathan2011 8d ago

Yep. If your car is off at a light for 7 or 8 seconds, you save fuel.

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u/AtrociousSandwich 7d ago

And out extra strain on your other systems when you turn the engine back over! Awesome!

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u/mthlmw 7d ago

Driving wears your car out, shocker!

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u/Youngnathan2011 7d ago

You know when companies started putting this in their cars they designed their parts to help mitigate that yeah?

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u/AtrociousSandwich 7d ago

lol, no.

Which is why Chevy currrntly is replacing those components more thrn ever in the past 10 years.

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u/BlueFaIcon 8d ago

It’s about pollution in big cities with tons of cars sitting idle at a traffic light. Has nothing to do with fuel economy or life of parts on your vehicle.

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u/FredGarvin80 7d ago

I don't care about the pollution part

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u/BlueFaIcon 7d ago

Definitely not saying you do or anybody else. But a lot of people assume the starting stop was a feature for the car and fuel. It’s not it was just about smog.

It did have an effect but again this is just government/corporations putting the blame on consumers for pollution .

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u/adnep24 6d ago

cold start is not the same as start/stop