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Originally posted by egregore:
Some "stop-start"-equipped vehicles have a separate battery, often hidden (the Jeep Wrangler's, for example, is in the left front wheel well) to operate the starter. Be mindful of this when disabling S-S. They will eventually go dead and/or corrode into uselessness and cause further problems.

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Originally posted by ridewv:
Thankfully as of last Thursday the EPA "emission credits" for start-stop were eliminated so I imagine new models will no longer have it. The problem with it was that by default the system had to be active and even though you could turn it off, once the car was shut off it defaults back to on again. And when it's off there's a light that stays illuminated on the display "reminding you that you turned off". There are plug-ins that you can buy that change the default to it being off so you don't have to press the off button every time you start but they don't eliminate the annoying dash light. On my Ridgeline the orange light's pretty bright, on my Civic it's so small I don't even notice it.

Someone with a newer Subaru said in the menu there was a display that logged how many times, for how long, and the gasoline saved, and over one year it saved like .6 gallons or less than $2.00.

It would be nice if dealerships were free to disable it on existing vehicles but I'm not sure the EPA ruling is saying that.

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Originally posted by P250UA5:

When I had my F150, i tracked it over a few months, with and without using S/S, no significant change, over the same commuting route & largely similar conditions.
In the TX summer, it would only shut off for a few seconds before turning back on due to A/C cooling demands.

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Originally posted by ridewv:

quote:

Originally posted by P250UA5:

When I had my F150, i tracked it over a few months, with and without using S/S, no significant change, over the same commuting route & largely similar conditions.
In the TX summer, it would only shut off for a few seconds before turning back on due to A/C cooling demands.

Yeah it can't let the vehicle stay off for long in very cold or very hot weather. Under most scenarios I think stop-start saves very little to nil while adding cost and complexity. Maybe for those who regularly commute through miles of stop and go traffic it could offer some benefit.

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Under most scenarios I think stop-start saves very little to nil while adding cost and complexity.

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EPA Says It's 'Killing' Stop- Start, and Here's What Automakers Have to Say
We contacted automakers for their take on this hot-button issue (no pun intended) and got some surprising responses.

By Joey CapparellaPublished: Feb 13, 2026

The Trump administration says it's going to eliminate stop-start technology requirements for cars, with EPA chief Lee Zeldin calling the technology "absurd."
Car and Driver wonders how a change in policy on this scale would actually work, considering most of the nation's newer vehicles already have the tech onboard.
Here's what six major automakers said when we reached out.
As part of a sweeping policy change, the Environmental Protection Agency (EPA) says that it's "eliminating" engine stop-start systems from American roads. How will this regulatory change play out in our vehicles, given that millions of cars are already in operation with this system in place? Only time will tell, but we wanted to know what the automakers have to say about this recent decision. So we asked.

Hyundai's statement was the most specific we received, pointing out that the EPA's rule changes simply remove incentives for automakers to use this technology, rather than banning it: "Start‑stop technology has never been federally mandated, and the EPA’s recent action removes regulatory incentives associated with it rather than prohibiting its use. Hyundai continues to comply with all applicable emissions regulations and regularly evaluates vehicle technologies based on customer feedback, regulatory requirements, and overall efficiency. At this time, we will continue to assess future developments as regulations evolve."

Ford's statement was less specific about how these policy changes could affect its vehicles but appears clearly in support of the change: "We appreciate the work of President Trump and Administrator Zeldin to address the imbalance between current emissions standards and customer choice. Ford has consistently advocated for a single, stable national standard that aligns with customer choice, the market, societal benefit, and American job growth."

Many others did not have anything to share about this issue. "We can't comment on that right now. Still too new to know anything about it," said a Subaru spokesperson. General Motors' response was similar, saying, "We don't have anything to share at this time."

Toyota, Nissan, and Honda all deferred to a statement made by the Alliance for Automotive Innovation, a collective made up of 42 automakers that has previously petitioned President Trump about EV policy changes. Honda said; "We do not have anything to share at this time. Please reach out to AFAI if you have additional questions."

John Bozzella, president and CEO, Alliance for Automotive Innovation, said:

"Today’s action is consistent with EPA's earlier announcement that it intended to repeal the endangerment finding and correct some of the unachievable emissions regulations enacted under the previous administration. I've said it before: Automotive emissions regulations finalized in the previous administration are extremely challenging for automakers to achieve given the current marketplace demand for EVs. The auto industry in America remains focused on preserving vehicle choice for consumers, keeping the industry competitive, and staying on a long-term path of emissions reductions and cleaner vehicles."

This variety of responses proves that it's too early to make sweeping judgments about the effects that this policy change will have on the cars we drive. But we will keep an eye out for any resulting modifications that these automakers will make—or not make—to their U.S.-market vehicles in the future, in response to this current EPA administration's fight against stop-start technology.

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Originally posted by KMitch200:
Also adding wear on the starter and battery.