Three levels of sketchy stuff you can buy online – Level 1

Submitted by Quizmaster on August 6, 2025
Apparently, in order to meet fuel efficiency standards, automakers who sell cars in the US are encouraged to put in an automatic engine shut off feature. This feature supposedly saves fuel by turning off the vehicle's engine when you come to a stop. When you take your foot off the brake, it really quick turns the engine back on again. It takes about 1 extra second to get going again, so hopefully you're not about to get rear ended or hit by a train.

If you've driven a recent model car, you've probably experienced this. It's highly annoying.

And while you can temporarily turn this feature off, it's not a permanent setting. You have to turn it off every time you drive the car. The dealer won't turn it off for you either (at least mine wouldn't).

What's worse is this feature doesn't actually save much gas. I ran the numbers and calculated that, in a typical year, this saved me just 1.5 5 gallons of gas per year. So it's definitely not worth it for the annoyance and the wear and tear on the starter motor.

Fortunately, you can buy a small device on Amazon that takes about 10 minutes to install and completely fixes this glitch. Does it invalidate your warranty? Probably. But you could easily take it out if that ever became an issue. In any case, it's probably safest to buy one that's highly reviewed and made in a western country.

Sketchiness level: 3/10

16 Comments
+2
Level 63
Aug 6, 2025
qm voided his warranty
+2
Level ∞
Aug 6, 2025
Oh, no, not the warranty.

If I come in with a defective bumper it's not going to matter if I have the component installed. The only way this matters is in the unlikely event the component actually causes damage. Given how annoying the engine shutoff is, I'll take my chances.

+3
Level 88
Aug 6, 2025
Interesting, didn't know you could mod that so easily.

I'm curious what 1.5 gallons works out as a percentage. That auto shut off thing supposedly saves 3-10% of gas at the lower end of estimates when I google it, according to 'experts'. Depends hugely on how much time you spend idling though. Some commutes are horrendous for sitting in traffic.

+2
Level ∞
Aug 6, 2025
I ran some more numbers and I think my 1.5 gallon estimate is too low.

Call it 5 gallons, maybe.

The percentage would heavily depend on how much you stop, and the length of the stops.

But here's the thing. If you stop a lot, while you do save more gas, it's also much more annoying. 100% of the savings come from annoying the driver. You also cause traffic congestion which negates part of the savings.

Furthermore, you need to stop for 7 seconds to break even. But this thing is always shutting off while queuing at stop signs. So many of the shut offs are actually net negative.

I still always shut off my engine when waiting for a long time such as at a bridge and encourage others to do the same.

+1
Level 63
Aug 7, 2025
well saving would most come for people that idle a ton, so i would say most of the saving come from a small amount of ppl
+1
Level 72
Aug 6, 2025
Is there any difference in gas waste between being in park with the engine on and being stopped in drive with the engine on
+2
Level ∞
Aug 6, 2025
I don't think so. You're idling either way.
+3
Level ∞
Aug 6, 2025
The funny thing is, I kind of hate idling cars. In Michigan, a lot of people do this thing where they drive to a park, and then eat their lunch in their car in the parking lot with the car idling. Can't stand it. And, yes, Europeans, feel free to laugh about this.

But, at the same time, I don't need to have the engine turned off every time I come to a stop sign. That's just overkill.

+3
Level 16
Aug 7, 2025
How is this related to JetPunk?
+3
Level 71
Aug 7, 2025
Do you think we can still use JetPunk if our cars all crash???
+1
Level 72
Aug 7, 2025
Well at least its relatively informative, even if it's a little unrelated.
+1
Level 78
Aug 7, 2025
My officemate has a tendency to buy stuff from Amazon (except it’s the cheap, Chinese versions). As a matter of fact while he was gone from our office over the summer for about 6 weeks he bought 187 items off Amazon…187! Maybe this is normal, but I thought it was extreme.

Anyway, I mention all this because sometimes I worry that some of the things he uses/runs in our office could be dangerous. The main thing that comes to mind is the ozone generator that he uses to "clean" the office. Does anyone know whether those things are actually safe??

+1
Level 63
Aug 7, 2025
does it generate ozone? ozone is acc harmful to breathe i think
+1
Level 78
Aug 7, 2025
Yes, but he claims it dissipates into the air very quickly and isn't anything to worry about. I'm not sure I agree.
+1
Level 99
Aug 7, 2025
If you're driving a truck/suv just hook up a trailer light adapter and it will disable the auto shut-off. If you're driving a car, you can generally avoid it by keeping the brake pedal just slightly depressed when stopped.

Either way, glad you figured it out!

+2
Level 81
Aug 7, 2025
Another downside to this technology is the need for a "Stop-Start" battery rather than the standard 12v car battery. In the UK these are around twice the price and with a shorter life.