Idling vs Turning Off the Engine [Merged]

**orly_andico** · August 18th, 2005 04:30 PM

ang alam ko 30 seconds to 1 minute lang. pero kahit ako di ko sinusundan itong rule na ito..
mbt is right, kung cold start, buhos yung fuel. pero kung operating temp na, starting the engine will not consume an excessive amount of fuel.

**empy** · August 18th, 2005 10:18 PM

Originally Posted by mazdamazda

well... the h2 will also consume MORE fuel than a civic when starting it up right? ;)

true...i didn't think of that

**dx8976** · September 2nd, 2005 04:58 PM

When is it better to keep the engine running as opposed to turning it off and then on? Minsan naka idle tayo sa traffic for 5-10 minutes, wouldn't it be better to turn off the engine? What negative effects would it have on the engine?

**lakay** · September 2nd, 2005 05:23 PM

No adverse effect to your engine if you turn it off, specially if you are idling for that long. It actually saves you a lot of gas because you engine running with 0 mpg/kmpl. I do it all time specially if I get caught on a railroad track and the train have more than 3 engine pulling the train because it means that it long wait. But if you are in our native land or somewhere hot/humid, you have to suffer from heat/sweat.

**Bogeyman** · September 2nd, 2005 05:33 PM

AFAIK, it's always ideal to keep frequent engine starts to a minimum, as engine parts are subjected to accelerated wear every time the ignition is turned on. On the other hand, you have the argument that idling the engine for too long wastes fuel.

It's one of those instances best left to judgement calls.

**dx8976** · September 2nd, 2005 05:43 PM

Originally Posted by Bogeyman

AFAIK, it's always ideal to keep frequent engine starts to a minimum, as engine parts are subjected to wear every time the ignition is turned on. On the other hand, you have the argument that idling the engine for too long wastes fuel.

It's one of those instances best left to judgement calls.

what parts would be subject to wear and tear? is it the same for both gas and diesel engines? does turbo have any impact?

lagi kasi kami nakaidle, waiting for kids, traffic, etc.
but now that fuel costs look like they're going to keep going up, it's time to rethink that...

**zero** · September 2nd, 2005 05:48 PM

i rather keep it on.
madalas sa mga alternative route na lang ako kesa naka-stop ako sa kalyeng matrapik.
ex. kapag matrapik ang ortigas dun ako sa shaw or pioneer dumadaan.

**ILuvDetailing** · September 2nd, 2005 06:00 PM

amount of fuel used to start = 2 mins idling, do the math

**jim** · September 2nd, 2005 06:01 PM

i'd rather keep in on specially at night time. mahirap na baka may gago na mang-holdap, at least pag naka on pwede na akong umarangkada agad hehehehe

**Bogeyman** · September 2nd, 2005 07:02 PM

Originally Posted by dx8976

what parts would be subject to wear and tear? is it the same for both gas and diesel engines? does turbo have any impact

The battery and the starter motor are just two of the things subjected to wear and tear with frequent restarts. However, there's also the contention that, provided that these are in serviceable condition, there will be no adverse effects with frequent starting as the manufacturer suggests. If at all, the cost of restarting adds some $10 (PhP500++) a year to the cost of driving, money supposedly recovered several times over in fuel savings. See here.

Diesel engines, by nature, are less prone to suffer internal wear than gasoline engines because of two things:

1. Diesel engines are built to withstand higher levels of stress, since they require a high compression ratio to ignite the air/fuel mixture.

2. Diesel fuel is sprayed into the engine during the combustion cycle, which lubricates the cylinder walls, thus reducing friction.

Not sure if it has any impact on turbo, though.