dgsteven
All-Star Author
Los Angeles
Posts:777
Points:202,900
Joined:Oct 2012
|
Message Posted: May 18, 2013 3:41:09 AM
yes, 1 min
|
WhiskeyBurner
Rookie Author
Illinois
Posts:15
Points:280
Joined:May 2013
|
Message Posted: May 17, 2013 9:40:19 AM
Haven't had the chance to look into one for the Chrysler yet, plus with it only being about 1.5 years old, I don't feel comfortable letting it sit with the keys in the ignition........give it another 8 years or so, then it might be different.
|
HotRod10
Champion Author
Wyoming
Posts:2,268
Points:40,310
Joined:Oct 2006
|
Message Posted: May 17, 2013 9:18:24 AM
" I can pull the key out of my Jeep while it's running and lock it, don't really have a way of doing that with the Chrysler though."
There's this really cool invention called an "extra key" I heard about; you should check into it.
|
dontuknowOH
Champion Author
Ohio
Posts:2,097
Points:36,545
Joined:Aug 2009
|
Message Posted: May 17, 2013 9:07:35 AM
No facts but my experience on warm-up economy; That depends on the type of engine, engine size, whether it is an older overhead valve pushrod cast iron block type or a modern overhead cam or cams aluminum head/block type, also radiators/hardware are made of a lot different materials today.
With 4 cyl. modern engines I believe a short warn-up is more economical up to 2 minutes at idle because rpms stay near 1800-1000 during that time and basically the engine is un-loaded except for the alternator drive loading.
Rear window defroster, heater blower, heated seats, any lighting, and the defroster mode trips on the A/C electric clutch/compressor, these up the needed energy loads drained from the engine which can raise the cost to idle when ECM/EFI is in open-loop enrichment on a cold start-up or any related low temp restart.
Larger engines, simply have more cubic inches of area and moving parts, more cylinders to use up idle fuel by heating up those dense larger surfaces, plus a larger engine needs more of a work load to reach normal temps by driving moderate. The reserve cooling capacity of larger older engines by design makes is costly to idle for warm-up, by practically (no loading) to that type vehicle at idle when warming.
If you choose to safely drive away in a sensible manner with any size engine for a quicker warm-up after 30-120 seconds I don't see any harm to the vehicle by mistreatment. GL... Driving!
rea
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 17, 2013 7:43:11 AM
no
|
WhiskeyBurner
Rookie Author
Illinois
Posts:15
Points:280
Joined:May 2013
|
Message Posted: May 17, 2013 2:59:25 AM
On my Jeep, only if I'm making a quick stop shortly after starting it during the winter, not only doesnit warm up enough to open the t-stat, but the mileage sometimes doesn't seem to be affected by that, other times it seems better.
Not with my Chrysler though, I can pull the key out of my Jeep while it's running and lock it, don't really have a way of doing that with the Chrysler though.
|
IAMCANADIAN73
Champion Author
Ontario
Posts:2,370
Points:1,117,825
Joined:Apr 2008
|
Message Posted: May 17, 2013 12:33:48 AM
Yes
|
HotRod10
Champion Author
Wyoming
Posts:2,268
Points:40,310
Joined:Oct 2006
|
Message Posted: May 16, 2013 10:43:20 AM
"as far as I know, (as a former owner) the Metros did not have any computer control and were carburetted engines"
A few of the earliest ones had carbs, but went with throttle-body fuel injection starting in 1991, I believe. Mine is a '92, and I know for sure it's fuel-injected, with an ECU, oxygen sensor, and the whole nine yards. I've personally replaced the O2 sensor a couple times and the injector once. The Pontiac Firefly in the test I referred to is a '98, with the same 1.0L, 3 Cyl. as mine.
|
johnchase
All-Star Author
Miami
Posts:524
Points:371,210
Joined:Jun 2011
|
Message Posted: May 16, 2013 10:27:16 AM
No
|
LKnight598
All-Star Author
South Carolina
Posts:792
Points:183,690
Joined:Nov 2005
|
Message Posted: May 16, 2013 12:08:43 AM
I try to, but I don't most of the time.
|
IAMCANADIAN73
Champion Author
Ontario
Posts:2,370
Points:1,117,825
Joined:Apr 2008
|
Message Posted: May 16, 2013 12:04:41 AM
No
|
Wanda127
Champion Author
Florida
Posts:2,479
Points:911,005
Joined:May 2010
|
Message Posted: May 15, 2013 12:22:39 PM
When I lived in a cold climate I warmed it up before I left the house for a few minutes. But now that I'm in FL. I just let it warm up as I drive. I always drive easy the 1st few miles in cold weather or if the car has been sitting awhile. I really can not tell a difference.
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 15, 2013 10:49:26 AM
no
|
hyeglenn
Champion Author
Fresno
Posts:1,055
Points:595,905
Joined:Apr 2011
|
Message Posted: May 15, 2013 9:50:15 AM
not this time of the year.
|
fkkf92
Champion Author
Toronto
Posts:1,893
Points:2,582,490
Joined:Jan 2005
|
Message Posted: May 14, 2013 9:38:07 AM
no, not necessary
|
streetirsx
Veteran Author
North Dakota
Posts:327
Points:120,100
Joined:Nov 2012
|
Message Posted: May 14, 2013 2:20:34 AM
Either way your gonna loose MPG becuse of the cold weather and the winter gas. The best way to warm up the engine is to install a block heater.
|
wildchild420187
Rookie Author
Washington
Posts:1
Points:1,720
Joined:May 2013
|
Message Posted: May 13, 2013 3:22:08 PM
I start, and run my car for about 5 min before I go anywhere. 1 so it is warm inside and 2 so that all the fliuds have time to thin out a lil from the heat. cold fluids will be more viscous and flow slower
|
captcarl5
Veteran Author
Pennsylvania
Posts:386
Points:171,130
Joined:Oct 2012
|
Message Posted: May 13, 2013 1:36:53 PM
no need to warm up a modern car
|
forestghost07
Sophomore Author
Miami
Posts:241
Points:3,350
Joined:Apr 2013
|
Message Posted: May 13, 2013 11:45:09 AM
"so i think it depends on the age of the car and wear and tear."
I agree. My computer-controlled SUV doesn't even realize it's "cold"; after about 30 sec. running it behaves as normal. I do drive it gently 1st mile or 2 till the temp gauge rises.
On the other hand, my 41 yr old, 207,000 mi. carburetted car needs 1 min or so of idle w/ manual choke to stabilize after a cold start.
|
BBF_PFS
Sophomore Author
Washington
Posts:184
Points:83,045
Joined:Jan 2013
|
Message Posted: May 13, 2013 11:43:28 AM
It is more a matter of comfort for the driver and passengers when we lived in Minnesota we would start the car and let it run for a few minutes when it was below zero, the seats were hard as rock and the transmission was sluggish if you didn't. It also gave you time to scrape and defrost the windows.
|
bcressy
Sophomore Author
Boston
Posts:112
Points:473,760
Joined:Dec 2007
|
Message Posted: May 13, 2013 11:23:23 AM
i drive two cars regularly: a 2000 Galant 4 cylinder (135k miles) and a 1986 GMC Sierra 8 cylinder (285k miles). the GMC runs substantially better in the cold if you let it idle for a good 15-20 minutes. otherwise, the brakes are over-responsive and the engine dies when you try to put the truck in gear.
so i think it depends on the age of the car and wear and tear.
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 13, 2013 8:47:46 AM
no
|
gougedQC
Champion Author
Montreal
Posts:5,130
Points:69,885
Joined:Apr 2008
|
Message Posted: May 12, 2013 9:18:16 AM
the necessary thin oil film stays on upper engine parts quite literally for many days. If it didn't, engines would wear out in a matter of months. Wrist pins would fail, cam bushings would fail... or rockers....vavle stems and guides..etc
There is no need to -warm- the engine at all. Even if your car has been sitting for over a week, within a matter of seconds the oil is circulating fully through the engine, Even If you get in a start on an extremely cold day (below freezing) and the car has been sitting for over a week, by the time youve adjusted your seat belt and checked the mirrors , 10-15 seconds and you're good to go.
If the car is driven regularly, the oil film will still be on the upper engine parts
|
borsht
All-Star Author
Oakland
Posts:778
Points:186,860
Joined:Aug 2012
|
Message Posted: May 12, 2013 8:24:16 AM
Just make sure you have oil flowing through all the bearings before you ooad the engine So, let it idle for 30 to 60 seconds before driving it.
Then you can drive easy for a few minutes to warm the engine.
|
IAMCANADIAN73
Champion Author
Ontario
Posts:2,370
Points:1,117,825
Joined:Apr 2008
|
Message Posted: May 12, 2013 8:02:17 AM
Always
|
IAMCANADIAN73
Champion Author
Ontario
Posts:2,370
Points:1,117,825
Joined:Apr 2008
|
Message Posted: May 12, 2013 8:02:06 AM
Yes
|
thebrohta167
Champion Author
New Jersey
Posts:1,460
Points:234,540
Joined:Nov 2010
|
Message Posted: May 11, 2013 12:44:59 PM
warm up as you drive
|
down2fumes
All-Star Author
Jacksonville
Posts:737
Points:178,105
Joined:Aug 2012
|
Message Posted: May 11, 2013 9:54:11 AM
no
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 11, 2013 9:40:51 AM
no
|
gougedQC
Champion Author
Montreal
Posts:5,130
Points:69,885
Joined:Apr 2008
|
Message Posted: May 9, 2013 7:15:15 PM
as far as I know, (as a former owner) the Metros did not have any computer control and were carburetted engines.---very few cars have carbs now, and everything is computer controlled.
The Suzuki Swifts (Cultus in Asia) badged as Metros ceased in 1997 as Geo and 2001 as Chev Spring (or pontiac firefly)
This is the generation I believe both you and I own(ed)
A cold engine is not as efficient as a warm engine , but an idling engine is the most inefficient of any kind of operation, thus and idling cold engine which takes quite a while o warm up, and then you go on your trip is absolutely going to use more fule than the couple of minutes max cold of the engine working which already is using gas to get you to your destination.
|
HotRod10
Champion Author
Wyoming
Posts:2,268
Points:40,310
Joined:Oct 2006
|
Message Posted: May 9, 2013 3:33:01 PM
"hotroc ignores something, ie the fact the computer controls are vsstly more efficient at determining the amount of fuel injected into the cylinders so there is far less waste and unburned fuel"
I didn't ignore anything (assuming you were addressing me). The fuel usage for the Metro linked to earlier clearly showed that the rate of fuel consumption was considerably higher when the engine was cold. The Metro in the test has the same type of computer controls as most other fuel-injected vehicles.
|
dgsteven
All-Star Author
Los Angeles
Posts:777
Points:202,900
Joined:Oct 2012
|
Message Posted: May 9, 2013 3:46:05 AM
yes, 1 min
|
gougedQC
Champion Author
Montreal
Posts:5,130
Points:69,885
Joined:Apr 2008
|
Message Posted: May 7, 2013 8:51:01 PM
hotroc ignores something, ie the fact the computer controls are vsstly more efficient at determining the amount of fuel injected into the cylinders so there is far less waste and unburned fuel
at -20C i still start and go...never a problem
warming the engine does nothing to warm the other mechanicals btw,,everything can just start and go.
|
sks1586
All-Star Author
New Jersey
Posts:560
Points:44,435
Joined:Mar 2013
|
Message Posted: May 7, 2013 1:13:36 PM
Thanks a million for the question & wisdom (contrasting by some) filled comments
|
mybigtruck
Sophomore Author
San Jose
Posts:109
Points:194,875
Joined:Oct 2009
|
Message Posted: May 6, 2013 6:53:35 PM
Warming up nets 0mpg. I start backing out of the driveway the moment oil pressure is up and I drive like a granny until engine temperature is up. The fuel spent warming up the engine got to move me a few miles closer to where I needed to go
|
Desoto49
Sophomore Author
KW
Posts:225
Points:472,875
Joined:May 2011
|
Message Posted: May 6, 2013 11:33:48 AM
No
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 6, 2013 8:22:47 AM
no
|
Z12
Champion Author
Toledo
Posts:3,642
Points:755,785
Joined:Mar 2011
|
Message Posted: May 4, 2013 6:38:09 PM
As needed
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 4, 2013 7:45:19 AM
no
|
diesel8888
Champion Author
Salt Lake City
Posts:1,171
Points:355,415
Joined:Nov 2011
|
Message Posted: May 2, 2013 1:25:13 PM
I started to drive slow to warm up, but not sure if this is more economical?
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: May 2, 2013 8:20:33 AM
no
|
ugly46
Sophomore Author
Indiana
Posts:166
Points:126,615
Joined:Jan 2012
|
Message Posted: Apr 25, 2013 7:38:27 AM
When it is real cold I let it warm up about a minute and then I am gone
|
PoyenGasHog
Sophomore Author
Arkansas
Posts:228
Points:296,615
Joined:Apr 2011
|
Message Posted: Apr 24, 2013 9:50:36 AM
When it has frost on the windshield, I let the vehicle warm up. Otherwise I am gone.
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: Apr 24, 2013 9:27:21 AM
No
|
HotRod10
Champion Author
Wyoming
Posts:2,268
Points:40,310
Joined:Oct 2006
|
Message Posted: Apr 24, 2013 9:20:11 AM
Easy for you to say, the1roadhog; what, it gets down to a frigid 50 or so there in Atlanta, doesn't it?
|
the1roadhog
Champion Author
Atlanta
Posts:9,898
Points:2,052,005
Joined:Jun 2007
|
Message Posted: Apr 24, 2013 8:26:10 AM
Drop the pedal and GO
|
aalix
Champion Author
Orange County
Posts:23,167
Points:4,118,470
Joined:Aug 2001
|
Message Posted: Apr 23, 2013 11:19:09 AM
Never tested to find out.
|
FahimAhmed
Rookie Author
Toronto
Posts:15
Points:4,630
Joined:Sep 2012
|
Message Posted: Apr 23, 2013 9:46:51 AM
I used to let the car sit idle for 2 to 3 minutes... But for newer model cars, is it really needed to wait for engine to warm up? Now a days I start driving after 30 seconds or so but drive moderately for 5 to 10 minutes...
During winter time, I used to do this idle thing when coming from work (car would be parked by roadside), but as someone said here, a running car would warm up faster. Well.. I did notice this difference.
However, letting car sit idle for few minutes is not a big gas waste when you think of engine efficiency, No? I agree with what HotRod10 mentioned
[Edited by: FahimAhmed at 4/23/2013 9:51:41 AM EST]
|
HotRod10
Champion Author
Wyoming
Posts:2,268
Points:40,310
Joined:Oct 2006
|
Message Posted: Apr 23, 2013 9:41:34 AM
gougedQC, since the engine is using considerably more fuel when you're driving than it does at idle, a decrease in mileage from driving with a cold engine may use more fuel overall than warming it up at idle. That was the question in the OP, which you and others have dismissed by saying that idling wastes gas, but that's only half the equation. Idling warms the engine, so it can run more efficiently at higher rpms and under load, when it's using many times the amount of fuel as when it's idling. My car burns about 0.2 gallons per hour (gph) idling to warm up and about 2.0 gph at highway speed. A 10% reduction in mileage due to driving it cold would result in the same overall fuel usage as idling it to warm the engine.
If you can drive at low rpm for the first few minutes, it may mitigate some of that reduction, but I don't have that luxury. I'm on a 75mph interstate within the first 2 minutes, and I'm not going to drive slower than the 40-ton trucks in my 1-ton Metro. I want to live, so if they're going 75mph, so am I.
|
b899
Champion Author
Connecticut
Posts:5,094
Points:1,572,840
Joined:Jul 2008
|
Message Posted: Apr 23, 2013 9:25:37 AM
No
|