My 6 speed manual Honda CRZ has it.

 

I am always impressed with what the GM engineers have been able to accomplish with the small block V8 compared to the one in my 1956, which I thought was great at the time.
The 1956 Vette weighed ~3000 lbs had a 265 cid engine with max hp of 240 gross (~200 net) and got about 15 mpg.
Compare that with the ~3500 pound C7 with a 376 cid engine, 460 hp that gets ~22 mpg average (and has much lower pollution and better crash capability.) All with the same bore spacing as the '56!
Consider on average only about 13% of the energy in gasoline gets to the rear wheels and 17% is wasted idling-why not!
I'm sure GM can make it as none intrusive as our X5 xDrive 35i BMW, SUV. Yes I can put it in sport and shut it off but I don't 95% of the time!
Here is a rough breakdown of how the energy in gasoline is used and wasted!



Typical Use of Energy in Gasoline. Only ~13% gets to the rear wheels; ~17% is wasted idling. Of the 13% sent to the rear wheels about a 1/3 goes to heat when braking! Regenerative braking is even being used in F1. Bet it will be in our Vette's and why not!

 

No problem in our BMW SUV, there is an electric water pump and that wasted heat in the cooling system fluid will keep you warm for a long time! (Also less parasitic waste.) In the summer, for a normal stop light the fan blows over the cold evaporator and provides cool air. If it can't keep it cool enough it just starts the engine.
Regenerative braking uses some of that wasted energy and helps keep the more highly utilized battery charged!

 

Also my experience is that the start/stop is programmed not to function in cold weather (below 35 or 40 degrees, I think). Overall, I think it is a pretty cool idea.

 

I can see this becoming a hot topic the moment it is announced by G M.

 

Revving the engine at stop lights will certainly take a hit. So much for those intimidating sounds the result in a stop light Grand Prix.

 

Nah. The ricers will disable it

 

Have it on the Range Rover .. I feel like it hurts the engine, so I just turn it off.

 

that would be my plan. I think I heard that the new Caddie XT5 will have engine stop&go so I hope I can disable it. The XT5 replaces the SRX.

 

I have never owned anything with it. Seems like a lot of wear and tear on the starter,battery and engine in general with oil draining away from bearings and engine top end.


Ben Casey - you slay me.... Why in the world you hang out on a performance car forum is beyond me. I really think you should migrate over to yellow bullet. Those guys would really enjoy reading your viewpoints. What in the world do you really own?

 

guys, they have this sorted out...they are not stupid. It's now been on BMW and Audi's for 4 years, no warranty problems or "hurting the engine". About 20 things have to be in play before it will allow engine to shut off, i.e. if it needs the heater or ac to maintain the temp you set, , it stays on, if your front wheels are turned, it won't, if the batt is low, it won't, if you are on a hill, it won't and so on...

Here are the BMW parametrs:

There are numerous vehicle parameters that are monitored as a part of the stop/start function to ensure the driving experience is not impacted. As many of the factors are not possible to monitor it may appear that the feature is not working. Reason why the stop/start may not shut down the engine include:
• The car is coasting (manual transmission)
• Brake vacuum reading is too low (manual transmission)
• Insufficient brake pedal pressure is being applied to hold the vehicle stationary (automatic transmission)
• Stopping on a hill/downhill with a 12% or greater gradient
• If the steering angle is more then 6 degrees
• If the steering wheel is still be moved after approximately one second of coming to a stop
• The system has not yet be activated by going over a speed of 5mph for automatics, 3mph for manuals since the last engine switch off
• If the gas pedal is being pressed (engine must be at idle speed only)
• You're coming to a stop from reverse
• The driver gets out of the car
• If Hill Decent Control (HDC) is activated
• If the engine is not up to temperature
• If the carbon canister is being purged
• if the grade of the fuel is too low for the engine
• Transmission adaptation is active (automatic transmission)
• The hydraulic pressure accumulator is not yet up to pressure (automatic transmission)
• Stop-and-go traffic - system is only activated by driving over 5mph for automatics, 3mph for manuals
• Batter charge is low
• Outside temperature is colder then 37.4 F / 3 C
• Outside temperature above 95 F / 35 C and the air conditioning system is on
• Fogging of the windshield is detected by the IHKA system
• Climate control system is on but passenger compartment has not yet reached desired temperature
• ABS system was used when coming to a stop

Alternatively the car may automatically restart outside the standard restart procedure if:
• The driver is moving the steering wheel
• The driver presses the gas pedal
• The transmission was shifted from D to P and subsequently back to D
• The transmission is shifted to N or R
• The battery charge runs low
• Outside temperature rises above 95 F / 35 C and the air conditioning is on
• Fogging of the windshield is detected by the IKHA system
• Low evaporator temperature is detected

 

Great info Glen. I'm also not worried as long as I have the ability to provide a human over ride.

 

While it provides savings in gas mileage, it was my understanding it's in place on Euro cars primarily to reduce carbon emissions.

 

yup, the switch is called "last user mode" i.e. if you turn it off when you are running, it will not come back on - ever - unless you flip the switch back the other way. Simply, it remembers the mode you want when you start the car. Kinda like how you set sport driving mode.

if your wife gets in and turns it back on, it will stay on until switch is flipped again. The switch is part of the starter button pad.

 

Well anyway. Sign me up, this feature is a no brainer.

I don't believe GM sabotages their cars, I actually think they care about warranty expenses and their reputation.

 

Funny reaction.. I am a conservationist... I like the old school conservative value of taking what I need and not wasting anything.

But I got on this kick after losing two close friends in the Middle East, 1 Marine, and 1 Army Ranger friend.

Then when you research what is going on, you learn that the Saudis are at the root of many problems, with direct funding of many terrorist groups. Not sanctioned by the King, or government, just what 25 year olds might do when they have access to billions of dollars..

So when I waste gas, it weighs on me, I hate our enemies I miss my friends.

 

I hope they never do have it.

 

If you are in 100 degree temps, shutting the engine off for even a few seconds is not acceptable.

If it really does not interfere with proper HVAC operations, then I'd be willing to give it a go but I certainly have my doubts.

 

Lol....if it's a 100 outside and you have 72 set, it won't shut off, you could not sell it if it did.

Relax, you,'re covered.......same for extreme cold.,

 

My wife driving my Corvette?!