Do you waste alot of Gas Idling in P..?

[chris kelvin]

Just wondering that.... If you idle for like 15 minutes in P how much does that waste..? Also i believe carbon builds up in the engine that way, if you idle for a long time.....but is it THAT bad..?

4.6L engine i'm referring to.

I try to shut my car off if i know i'm gonna be sitting, or waiting....hopefully i'm saving gas...lol.

 

[SLY GT]

yes x2

 

[menasci]

Yes you waste gas.
It's good to shut off the car if idling for a few minutes or more.

 

[timeless2]

Food for thought:
Police cruisers run almost 24 hours a day, with our same engines.
Idling with no load is not going to dent your wallet; rather you should be concerned with the side effects of constant idle speeds.

 

[ponysarepretty]

40 seconds is the same as starting your engine once... just food for thought

it is about 1 hr per gallon.

 

[ponysarepretty]

and our cars start up pretty easily... good old COPs... if you are waiting for someone, probably best to turn of the engine.

 

[40th GT]

Food for thought:
Police cruisers run almost 24 hours a day, with our same engines.
Idling with no load is not going to dent your wallet; rather you should be concerned with the side effects of constant idle speeds.

So what are those side effects? Excessive carbon build up?

 

[timeless2]

So what are those side effects? Excessive carbon build up?

Excessive engine wear, increased pollutive outpout, higher likelihood of fouled o2 readings, intake passage carbon buildup are a few, other than spending fuel while gaining 0 velocity.

Last paragraph, page 2.
http://www.autoshop101.com/forms/h57.pdf

 

[Nater]

Yes you are wasting gas compared to shutting it off. If you are going to wait at least 30-40 seconds while idling, it is best to shut it off and restart it.
Excessive idling does increase engine wear, carbon build-up, etc.

 

[deftsound]

i doubt its thats bad

 

[timeless2]

Yes you are wasting gas compared to shutting it off. If you are going to wait at least 30-40 seconds while idling, it is best to shut it off and restart it.
Excessive idling does increase engine wear, carbon build-up, etc.

So that is why police cruisers and passenger taxis (equipped with 4.6 liter powerplants) often tick up 200,000+ miles?

 

[joshheat25]

yea good question they last in upwards of 200,000 miles. Off Topic But What is the Police Interceptor engine?? is it the 4.6 DOHC?

 

[timeless2]

I think SOHC, but this was interesting: DOHC

 

[deftsound]

if you mean the cop cars their sohc

 

[LB0193]

and our cars start up pretty easily... good old COPs... if you are waiting for someone, probably best to turn of the engine.

-they run so the cars stay cool inside, and warm inside in the winter when they are not in the car ie...doing paperwork in the pd

 

[Nater]

So that is why police cruisers and passenger taxis (equipped with 4.6 liter powerplants) often tick up 200,000+ miles?

I'm not saying that the engine is going to blow up, but letting it run when it is not necessary does increase the engine wear. Common sense.