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Old 12-24-2012, 02:57 AM   #1
cjimenez3
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Default Quick Question!!

My first question is how bad is it really to not warm up your car every time... because I do try to warm her up every time but most times im running late.. doesn't really work out... how bad is it??

second how bad is it to shake or i guess move around the shift knob when in neutral at a stop light or something because I tend to just move it around every time in neutral (bad habit i know) how bad is it??

thanks
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Old 12-24-2012, 03:23 AM   #2
Counterfit
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Sitting around warming up for more than 30 seconds or so (maybe a full minute when it's really cold) is just a waste of gas and time. Just take it easy until it's warmed up.
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Old 12-24-2012, 05:30 AM   #3
aboothman
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Quote:
Originally Posted by Counterfit View Post
Sitting around warming up for more than 30 seconds or so (maybe a full minute when it's really cold) is just a waste of gas and time. Just take it easy until it's warmed up.
Here we go again

It is extremely basic. Cold engines do not like to run which is why they run at higher RPM while warming up. It takes extra fuel to ensure combustion so the RPMs are raised provide for more complete combustion (at an ideal AFR) and to speed warm up.

Oil does not provide the required protection for operation under load until it is at it's ideal temp either.

Bottom line: While "taking it easy" you are still accelerating wear while diluting your oil with excess fuel. It becomes a question of how much your "gas and time" is worth. Anyone that says otherwise without some hard evident, even internet "PhD physics gurus", are wrong.

Don't get me wrong...we all do it. I doubt anyone could give a solid answer such as "your engine will wear out 6329 miles sooner if you do not warm it up", but it will wear quicker.
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Old 12-24-2012, 12:29 PM   #4
cjimenez3
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thank you... i was just wondering because my friend just bought an evox and said that these trannies for awd cars go quick if you dont treat them right...
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Old 12-24-2012, 04:30 PM   #5
Gallo2011
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Quote:
Originally Posted by aboothman View Post
Here we go again

It is extremely basic. Cold engines do not like to run which is why they run at higher RPM while warming up. It takes extra fuel to ensure combustion so the RPMs are raised provide for more complete combustion (at an ideal AFR) and to speed warm up.

Oil does not provide the required protection for operation under load until it is at it's ideal temp either.

Bottom line: While "taking it easy" you are still accelerating wear while diluting your oil with excess fuel. It becomes a question of how much your "gas and time" is worth. Anyone that says otherwise without some hard evident, even internet "PhD physics gurus", are wrong.

Don't get me wrong...we all do it. I doubt anyone could give a solid answer such as "your engine will wear out 6329 miles sooner if you do not warm it up", but it will wear quicker.
And so your recommendation is...???

OP, I warm my engine up for about 20-30 seconds, then drive conservatively until my temp gauge needle reaches the midway mark, which tells me the engine is fully warmed up. By conservatively, I mean keeping revs at or below 3000 or so. That gives the engine and tranny sufficient time to come up to the proper operating temperature.
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Old 12-24-2012, 04:53 PM   #6
Kevwa451
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Unless your car sits in a 60 degree garage all year round then there's nothing you can do in the winter to help it. Letting it warm up is going to let it run rich and introduce fuel into your oil because your piston rings aren't quite expanded fully. Driving it and taking it easy will do what aboothman said. Just do what you want and don't worry so much. As long as you're not turning they key and immediately holding the rpms at 5000rpm or pulling out as hitting full boost you'll be ok. And remember if you're just letting your car sit to warm up only the motor components are warming. The diffs, tranny and any bearings in the suspension and else where other than the engine are still ice cold until you get moving. And because your temp gauge says the coolant is up to temp doesn't mean your oil is. In all likely hood it's probably still quite cool. If its super cold out letting it run isn't a bad idea but I wouldn't let it go for more than 5 minutes.
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Old 12-24-2012, 04:54 PM   #7
DHRDAN
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As long as you don't floor it like 30secs after it starts.


It doesn't matter.


The ecu and the car can handle it.



STOP with these... "omg i didn't warm it up" threads.
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Old 12-24-2012, 04:56 PM   #8
DHRDAN
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Quote:
Originally Posted by aboothman View Post
Here we go again

It is extremely basic. Cold engines do not like to run which is why they run at higher RPM while warming up. It takes extra fuel to ensure combustion so the RPMs are raised provide for more complete combustion (at an ideal AFR) and to speed warm up.

Oil does not provide the required protection for operation under load until it is at it's ideal temp either.

Bottom line: While "taking it easy" you are still accelerating wear while diluting your oil with excess fuel. It becomes a question of how much your "gas and time" is worth. Anyone that says otherwise without some hard evident, even internet "PhD physics gurus", are wrong.

Don't get me wrong...we all do it. I doubt anyone could give a solid answer such as "your engine will wear out 6329 miles sooner if you do not warm it up", but it will wear quicker.


Yes you accelerate wear.


but so does jacking off... are you gonna stop that too?
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Old 12-24-2012, 05:17 PM   #9
Mulder
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Search please, this has been discussed here many times.
And in the future please use more descriptive subject lines, "Help" and "Quick Question" don't cut it.
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