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Let the truck warm up? #5240799 10/15/19 09:14 PM
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Dragon44 Offline OP
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I've always thought on cold mornings 32 and below let your gas truck warm up for 10 or 15 minutes before driving. Some people tell me it's not good to idle that long but some people tell me it is good for your truck. Good to let the oil warm up a bit before driving or no? Trying to see what the general consensus is?

Re: Let the truck warm up? [Re: Dragon44] #5240806 10/15/19 09:23 PM
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oldhp Offline
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I start my (anything) clean windshield if needed, put on seat belt, figure out what I want listen to. By now the "it" has idled down. Put it in gear and drive moderately for 4-5 miles. Once the oil temp hits 105° and water temp is now at least 180°, set the cruise and go. I'm only 5 miles from a interstate so when I get on it cruise goes to 75MPH.
That's what I do. cheers


"None of us are getting out here alive.....drink that beer.....eat that pizza......drive that Hot Rod"
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Re: Let the truck warm up? [Re: Dragon44] #5240807 10/15/19 09:24 PM
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jakewells Offline
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I let mine run for 10 minutes before going anywhere when it is cold and it seems to do alright.


1996 Chevy 1500 4.3 V6. Harvest King 5W40 Fram XG3980 oil filter
Pennzoil sycromesh >> transmission
Shell rotella nitrite free ELC >> radiator
Shell Spirax HD 80W-90 >> rear axle


Re: Let the truck warm up? [Re: Dragon44] #5240810 10/15/19 09:27 PM
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PimTac Offline
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For the first start of the day, Above freezing, 30 seconds to a minute. Below freezing I add another minute. If the windows are iced up then that has to be taken care of first.


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Re: Let the truck warm up? [Re: Dragon44] #5240811 10/15/19 09:28 PM
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fsdork Offline
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I would suspect the extra fuel burned by idling the vehicle for 10-15 minutes on each cold startup would be more expensive than any additional wear and tear caused to the engine by putting it in gear and driving gently (after the revs drop from high idle). With that said, I like fog and frost-free windows when I'm driving, so I let my vehicles warm up. It seems whenever I've skipped a warmup in the winter, I've ended up pulling over a block away to deal with foggy windows.


2003 Ford Explorer Limited 4.6L 4x4 - 219K km
2008 Ford CVPI 4.6L - 133K km
2011 Ford F-150 Lariat S/C 6.2L 4x4 - 90K km
Re: Let the truck warm up? [Re: Dragon44] #5240829 10/15/19 09:50 PM
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ammolab Offline
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Trouble is...the oil doesn’t warm up at idle. Start up the vehicle, buckle up, tune in your songs/news as desired and drive off with mild throttle & revs for the first 5 miles or so.
Modern DI engines are especially going to put an end to the myth: It is better to “warm up” this way. Sounds like death by fuel dilution to me.


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Re: Let the truck warm up? [Re: Dragon44] #5240832 10/15/19 09:55 PM
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Elkins45 Online Content
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I’ve never let a vehicle warm up any longer than it took me to scrape the frost, assuming there was frost. If there wasn’t then I was rolling within 10 seconds of turning the key. I’ve been doing that for 40 years now and have never had an engine problem of any sort.

Re: Let the truck warm up? [Re: Dragon44] #5240833 10/15/19 09:55 PM
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spasm3 Offline
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I would worry about idling a DI engine to warm up. Potential dumping of fuel in the oil. A minute or so or until you can see out the windshield, then drive.


13 elantra 78k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 16400 miles m1 0w40
Re: Let the truck warm up? [Re: oldhp] #5240851 10/15/19 10:42 PM
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Oro_O Offline
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Originally Posted by oldhp
I start my (anything) clean windshield if needed, put on seat belt, figure out what I want listen to. By now the "it" has idled down. Put it in gear and drive moderately for 4-5 miles. Once the oil temp hits 105° and water temp is now at least 180°, set the cruise and go. I'm only 5 miles from a interstate so when I get on it cruise goes to 75MPH.
That's what I do. cheers


This is close to the "ideal" that I've heard from knowledgeable sources on this forum and others, and pretty much what I do, too.

I let mine warm 30 seconds, then go but keep it under 2k and very gentle until the water temp is swinging towards normal (getting close to 180F). Minimizes the fuel dilution, which can be quite pronounced in the cold (and which also maximizes wear since the fuel is washing the lube off the walls), and maximizes warm-up speed.

Re: Let the truck warm up? [Re: Oro_O] #5240857 10/15/19 11:05 PM
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AC1DD Offline
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Originally Posted by Oro_O


This is close to the "ideal" that I've heard from knowledgeable sources on this forum and others, and pretty much what I do, too.

I let mine warm 30 seconds, then go but keep it under 2k and very gentle until the water temp is swinging towards normal (getting close to 180F). Minimizes the fuel dilution, which can be quite pronounced in the cold (and which also maximizes wear since the fuel is washing the lube off the walls), and maximizes warm-up speed.



Bingo! Correct answer.

Re: Let the truck warm up? [Re: Dragon44] #5240876 10/16/19 12:30 AM
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csandste Offline
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Warming up the engine does nothing to warm up the rest of the power train, plus it wastes gas. Get it moving....slowly.


2017 Kia Soul Plus-- VWB 5w30-- 70,000 miles
Re: Let the truck warm up? [Re: Dragon44] #5240882 10/16/19 01:16 AM
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billt460 Offline
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In cold climates if I was concerned enough to allow for a 10 minute warm up, I would simply have a block heater installed. You not only will save gas and wear over time, but the engine is warm enough to drive as soon as it starts.

Out here it is of no concern. I start up, and as soon as it comes off high idle, I'm in gear and on my way.

Re: Let the truck warm up? [Re: Dragon44] #5240889 10/16/19 02:18 AM
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PWMDMD Offline
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The only reason to let the car warm-up is to let the interior warm-up.


Current: 2019 Lexus RX 350 (Mobil AFE 0W-30 and Toyota OEM Filter) and 2018 Honda Pilot Touring (PP 5W-30 and Mobil 1 EP M1-110A Filter)
Re: Let the truck warm up? [Re: Dragon44] #5240890 10/16/19 02:23 AM
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demarpaint Offline
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I start the engine, when the tach gets to about 1,000 rpm I start driving. That could take 30 seconds to about 2 minutes depending on how cold it is. I drive nice and easy until the engine reaches normal operating temperature.


God Bless Our Troops

Re: Let the truck warm up? [Re: Dragon44] #5240892 10/16/19 02:34 AM
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MetalSlug Offline
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Hot summer day I never let the cars warm up
On cold month . I let it warm up for a min or 2 .

The key is to drive easy and slow for first few miles until the car fully warm up . That all

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