Never driven one but how long do you need to be stationary before it kills the engine, if its instant then thats just stupid.
smalltrader2,
Jul 7, 6:22am
For Mazda. It is about 5 secs with your foot firmly on the brake before the engine is cut off. Unnerving if you are not used to stop/start system especially on a busy intersection.
barbs77,
Jul 7, 7:06am
I have a giulietta, and its about 3 seconds.
toomuch3,
Jul 21, 3:06pm
My Mazda has the I-Stop (idle-stop) Have to say I don??
bushells,
Jul 21, 8:29pm
I had a Mazda CX-5 at my previous job and enjoyed driving it. It saves a lot of fuel especially in Auckland traffic. I found the fuel economy was better around town than on the open road. Yes, the batteries are more expensive and I understand that the computer is programmed to do 10,000 starts and then the istop stops working until the starter is replace. Vehicle will still start but the istop doesn't.
toomuch3,
Jul 22, 7:50am
I thought the Mazda technology used compression within the cylinder to restart rather than using the starter motor. Maybe they use the two technology's - mine has the SkyActive engine which has a higher compression ratio - so maybe this is what enables the starter motor free restart
smalltrader2,
Jul 22, 8:18am
I believe the 10000 cycle is refering to the stop/start battery and not the starter motor. The big fat battery has a rating of 10000 stop/start if maintain properly. Maintenance means you may have to give it the occasional top up charge rather than let the battery run down if you are mainly doing city driving.
kevymtnz,
Jul 22, 8:38am
be better to leave a gap and idle along brake little and no on n off the gas
inkapuka,
Jul 24, 12:32pm
There is an episode of bbc topgear where they test drive a nice jag v8 thing. He is ripping it up then stops and it instantly cuts the engine off. Then says who rolls up to a traffic light in a cloud of smoke! Stupid technology.
cjdnzl,
Jul 24, 1:59pm
That's 'double DEclutch' referring to letting the clutch out while in neutral and blipping the engine to speed the gear cluster up to match the driveshaft speed when changing down, A true art form to execute properly.
cabrio1,
Jul 24, 6:32pm
My question is what happens to the engine oil pressure? You stop, engine cuts out. Go again, shoot off into traffic with no oil pressure? Surely this will cause premature wear in the engine or have they though about this? Drove one in the UK , Mercedes, hated it and turned it off.
toomuch3,
Jul 25, 9:40am
I'm not a mechanic so I'm sure they can answer better - but I cant imagine it would be a problem.
Why? Well in my car it has a feature that when you turn it on from cold it revs fast for a wee while to quickly bring engine up to temperature. All good. But, say I am away for a while. Like I have just been away for three weeks and my car has sat in the garage and presumably all oil in every crevice has drained well and truly back down into the sump. Then I get back home turn the engine on in fast rev mode - I wouldn't expect the engineers to create something that would wreck my engine.
But back on topic. You have come to a stop at the lights, engine hot, oil sloshed around everywhere. Over a couple of minutes some oil no doubt drains away but I'm guessing there is still enough residue for it not to be a problem between the time you get your foot off the brake (and engine starts and pumps oil) and pushing the acceltator
elect70,
Jul 25, 10:47am
Might save a little fuel but starter motor & battery life will be shortened dramatically . Is it really worth it ?
richardmayes,
Jul 25, 10:56am
There's no delay whatsoever in getting started again with the stop-start system in a Prius. just saying.
melonhead1,
Jul 25, 11:03am
This is pointless technological overindulgence. Either make it an electric car or bugger off.
toomuch3,
Jul 25, 11:03am
In My Mazda it doesnt use a starter motor - its something to do with compression in a cylinder.
But I take your point. I can meet the required conditions so infrequently my Stop/start hardly ever works. For the R@D costs, battery costs, environmental costs of digging up more battery stuff extra weight, wiring, computer stuff , more bits to fail / replace I cant imagine it would be worth it at all.
saxman99,
Jul 25, 2:39pm
Yes it does still use the starter motor. The computer stops the engine with one cylinder at max compression but then does still need the starter to give the engine a nudge. Once it starts to move the piston under compression does the rest to achieve the restart.
kazbanz,
Jul 25, 3:03pm
barbs77-if you are commuting in Auckland then yep perservere with the I stop
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