engine cut off at stop lights etc.

The Q30 compact luxury hatchback will use a Mercedes platform and engine.
Jamo002
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engine cut off at stop lights etc.

Postby Jamo002 » Mon May 08, 2017 1:18 pm

What do y'all think of this? I have been turning it off because it bothers me but, WILL IT SAVE A SIGNIFICANT AMOUNT OF FUEL? WILL IT WEAR OUT THE STARTER or related parts?

Jamo in ATLANTA Owner sonce Jan. 30 2017


Peejey
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Car: Infiniti Q30 1.6t DCT

Re: engine cut off at stop lights etc.

Postby Peejey » Fri May 19, 2017 5:23 am

Engine start stop systems have been developed essentially in order to obtain vehicle emission certifications, whose conditions have nothing to do with real life use anyway. As for fuel saving, by definition it saves fuel but in such exceedingly small amount that again you won’t see the difference in real life.

amc49
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Re: engine cut off at stop lights etc.

Postby amc49 » Tue Jun 27, 2017 5:39 pm

It's a safety issue, you may need that instant power a thousand times more than any mileage you could ever save there. Wait until you see that guy bearing down on you in the mirror and you could just stomp on the gas or pop the clutch to even get moving enough at all to great lower impact force. Oops, that won't be YOU will it?

No, no, NO.

NO WAY on earth would I be doing that, and with TWO separate occasions in the past where it likely saved my neck from an impact.

ArmedAviator
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Re: engine cut off at stop lights etc.

Postby ArmedAviator » Tue Jun 27, 2017 6:30 pm

Terrible idea. It WILL wear out starter, battery, alternator, and other components quicker. Shutting off engine also lets all the oil pressure bleed off and every time you re-start, you have inadequate oil pressure for a second or two which will wear things out FASTER than leaving it running.

Not to mention the safety concerns as mentioned by amc49.

Don't do this.

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AZhitman
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Re: engine cut off at stop lights etc.

Postby AZhitman » Tue Jun 27, 2017 6:39 pm

Guys, it's an automatic start/stop system, such as many hybrids use.

He's not turning the car off, he's turning off the stop/start feature.

Pretty sure the NHTSA wouldn't allow it to be present (since the early 90's) if it posed a danger.

Jamo, if it's annoying, by all means, keep doing what you're doing... However, it was designed to function exactly as you describe.

amc49
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Re: engine cut off at stop lights etc.

Postby amc49 » Thu Jun 29, 2017 5:47 pm

'Pretty sure the NHTSA wouldn't allow it to be present (since the early 90's) if it posed a danger.'

LOL, that one has me rolling in the aisle.

Apologies from my end over any misunderstanding BUT, I still feel the same way. Having actually been in that situation. Why I will never own a hybrid among several other reasons.

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AZhitman
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Re: engine cut off at stop lights etc.

Postby AZhitman » Fri Jun 30, 2017 12:21 am

Not sure what's funny, but OK.

I'm no fan of auto-stop/start or whatever either, but I've owned three cars with it (early hybrids) and there was no difference in acceleration from a stop than if the car was running. None at all.

BTW, some hybrids (my past ones included) out-accelerate their gas-powered counterparts from 0-20, 0-30.

So, if you're terrified of being rear-ended, you might want to consider swapping out. ;)


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