Auto StartStop

[Zig]

Actually it is far more clever than that with the Toyota (and other hybrids) including those with an ISG where the position the engine is at when it is off is pre-determined to make restart easier and consistent, unlike a start from a starter motor which just has to deal with what it finds from cold.

Are there loads of engines failing because of S/S? And before you answer remember pretty much every car in the world has some form of S/S that was made in the last 15 years.

I agree simple S/S systems as fitted to the Mustang are crude but they also stop the engine far less compared to a hybrid, maybe three to five times as often over the life of the vehicle depending on use, compared to hybrid 100s of times.

30 years of S/S systems means the modern cars work just fine with it.

Why are we conflatIng start stop ice and hybrids?

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[Frogdog1]

This is a really easy issue. Use SS or don't use it. This argument has no end except for the one that wants the argument to go on forever and that person is never wrong (just ask him), and no, before the accusation is made, it isn't me. I just put her on my ignore list.

 

[CzechMate]

This is a really easy issue. Use SS or don't use it. This argument has no end .

I agree. My only reason for joining this discussion was to share a great video that clearly shows how damaging mixed friction can be for an engine. I also agree that everyone should do whatever they want with their own car. But for those looking for a bit of technical foundation behind their choice, that video offers something worth considering — especially when it comes to the Mustang, whose engine was never designed for frequent start cycles. I’ll believe they’ve truly reinforced the bearings when I see high-mileage 7th-gen cars running flawlessly. Even then, my GT stays Start/Stop-free.


By the way, I had Start/Stop in most of my previous cars — including a 2017 BMW 330 and a 2019 BMW 530. In 2022 I sold the 530 and bought my first Mustang and one of the reasons I loved it was precisely the absence of that system. Nothing dumber than stopping to reverse into a parking spot, only for the engine to shut off and immediately start again. Both Bimmers did that constantly — until I disabled the atrocity.

 

[CzechMate]

I think you're overlooking oil film strength. One of the big advances in oil technology. It allowed the use of thinner, more fuel efficient oils, and reduces wear on cold starts.
I do agree though, that ASS is the devils work.

True, that’s a good point — I didn’t mention oil film strength. Modern oils have definitely improved in that area. However, even the best oil film still needs pressure in the crankshaft bearings to completely avoid mixed friction. So while the improved film helps where loads are lower, it doesn’t eliminate the brief metal-to-metal contact during the combustion phase before full oil pressure builds up — and that’s exactly where most of the wear happens.

 

[Dragster]

I think we should shoot for another 20 pages of back and forth in this thread.

 

[Frogdog1]

I agree. My only reason for joining this discussion was to share a great video that clearly shows how damaging mixed friction can be for an engine. I also agree that everyone should do whatever they want with their own car. But for those looking for a bit of technical foundation behind their choice, that video offers something worth considering — especially when it comes to the Mustang, whose engine was never designed for frequent start cycles. I’ll believe they’ve truly reinforced the bearings when I see high-mileage 7th-gen cars running flawlessly. Even then, my GT stays Start/Stop-free.


By the way, I had Start/Stop in most of my previous cars — including a 2017 BMW 330 and a 2019 BMW 530. In 2022 I sold the 530 and bought my first Mustang and one of the reasons I loved it was precisely the absence of that system. Nothing dumber than stopping to reverse into a parking spot, only for the engine to shut off and immediately start again. Both Bimmers did that constantly — until I disabled the atrocity.

I agree with every word you said. I too have chosen to not use the Start/Stop feature. I commend you for your emotional intelligence and logic on the issue.

In my post you replied to, my real point is that there is no point is arguing over something that has a "black and white" choice for the car owner and that the "arguments or disagreements" for and against SS will never end. I like simplification so mankind can move on. Surely, there is something else of interest on Mustangs.

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