It winter and it a debacle over whether warming a car is better to idle or to roll and leave it under 2500 rpm
I am told all 'fuel inject' cars are better to roll, I agree it faster but I am also told idling is bad for the engine...any takes?
(assuming all cars are fuel inject, not sure what else is there)

Thanks!

 

I always give mine a minute or two of idling before I take off, and then I drive it gently until the temp gauge comes up. Especially on a day like today (high -3degrees F)

 

I let mine warm up very little, less than a minute, and then just drive normal. If it's real cold I do let it warm up a little longer, but not much. I am NOT saying this is good for the car or what you should do, it's just what I do. I have always thought that once the idle comes down to normal, it's fine to drive the car.

 

I do the same.

No, it would not hurt anything to idle for warm up, except it uses excess fuel and you have 0 miles/gallon. Carbon sludge may form faster as the engine is cold & the A/F mixture is rich.

I would idle 1-2 minutes then drive gently until the coolant gage begins to rise. I wait using full power until the coolant gage is at 3 Oclock or I have driven at least 15 minutes.

This is more of a personal preference than a fact.


JPN

 

Man,
If it is like 20F I will wait 2-3 mins, if it is 10F I will wait 5-10 mins if it s OF or lower I wait no less than 10 mins. I like to ride in a relatively warm car, with clean windows and a defroster that is working. Being able to see where I am going is far more important than a little carbon, and I use 1 can of Lucas fuel system cleaner a month and at least one tank of sunoco premium, a month. I seafoam all my cars at least once per year...So, I believe I am keeping any carbon in check...

 

+1 Adrenalin540!!!!!!!!!!!!!

 

One thing I should add is my cars are always garaged which does make a big difference. When leaving work, if the windows are steamed I do wait for them to clear which means I warm the car longer. I keep the pedal to the metal pretty often to take care of carbon build up.

 

If you want the windshield to be clear as quickly as possible, make sure to turn on the defrost (this turns the A/C compressor on for the EEC, not sure about the manual EC) and turn off REC.


JPN

 

FYI if you don't let your car warm up you will use more gas. How much more, I cannot say really.

If you let it warm up you will use less gas how much less I cannot say again.

So let your car warm up before driving off. 5 minutes will do fine.

 

Five minutes before going to work. Five minutes for going to lunch. Five minutes when I leave work to come home. That's one hour and 15 minutes per week I sit in my car warming it up. I think not.

 

Who sits in their car? I start it it remotely, and get ready for work...LOL, Not laughin at ya, just I'd never spend >5 mins sitting in my car to warm it...Even at work, when I leave the gate, I remote start it, if I have to scrape the windows, or dust snow etc, when I get into the car it is warmed up...

 

To be honest I do not know a single person that has or uses a remote starter on their car. And everybody I know just starts their cars and goes almost immediately just like I do.

 

All I was saying is that it is recommended to let your car warm up for five minutes before driving off.

1. Start it and sit there. Not that bad really. I do it everyday I go to work.

2. Bring two keys with you all the time, start it with the one and go back inside.

3. Don't warm your car up and use a little more gas, how much I don't know.

I don't have an issue with waiting in my car for five minutes. It isn't that bad really.

 

Oil bathing cams when cold:
http://www.youtube.com/watch?v=SmoGXRJE1_g

Oil bathing cams when warm:
http://www.youtube.com/watch?v=wVT4OYfKEx4

You can even hear the difference as the oil makes a splattering sound when warm. I let mine warm up! But then again it typically sits for 2-3 days between starts.