What temp was your coldest outside start without being plugged in and what oil were you using?

about 50 degrees using 15w40


:ro)

80 degrees if that. Actually last January I think I started it a whopping 70 degrees. LOL

15 degrees with Mobil 1 Delvac Synthetic. - No problem.

-22

It wasnt plugged in, actually I havent yet, and using Valvoline premium blue fully synthetic.

Oh yeah, and it took a while to warm up.

-13F* and it took a while.15w40 Mobil Delvac.

-25 F Delo 400

-10F. in Vermont with Rotella T 15/40 dino oil--no problem

-10 °F after sitting overnight in mid Michigan with factory fill 15W-40 oil. NO problem at all. :) -I have never plugged-in the block heater.

-27 °F in the sun up in Canada
... not plugged in. Walked like a washing washing with a full load :eek:

-20C using 5W40 Full Synthetic oil...no problems

-20 C with Esso XD3 0W40 Synthetic

Started fine.

I have started it down to -40 C being plugged in.

-35c at a site, no plugins. It rattled for awhile. the elavated idle work good. 15w40 royal purple.

-40F for my uncle on a snowmobile trip to the upper part of canada on the snow train in the middle of january. no problems but it did rattle for about 5 mins. with about a 20 mph wind. It was cold to say the least!!!!!!!!!!! 15-40 rotella T

I've started mine a few times at -40. It started well although it does rattle for a bit. They start better then most gassers.

-2f and I felt bad. Now that I see-40 and lower I feel better. It is nice knowing that it's already warm when it's plugged in, though. The heat works WAY sooner! Oh yea, 15w40 Rotella.

There's a difference between -40c and -40f....

There's a difference between -40c and -40f....
really???? come on.....no way.....thanks for that post captain obvious....):h

wouldn't -40c be somewhere around -74f???

really???? come on.....no way.....thanks for that post captain obvious....):h

Tomorrow, after school, at the flagpole, be there cause we're gonna fight.

Tomorrow, after school, at the flagpole, be there cause we're gonna fight.
LOL want me to bring your lights then??? your gonna need um after I knock your lights out):h

LMAO...

You guys are funny because I believe you're arguing over nothing! I'll go check in a second to be sure, but I believe -40 is where the two scales cross...-40 F = -40 C in other words!):h

You're both dumbarsses!!!:lol:

http://www.usatoday.com/weather/wtempcf.htm

Read 'em and weep, boys.:rolleyes:

Oh, and my truck was started in -12F weather without being plugged in.

The wind was howling, but that makes absolutely no difference to an inanimate object in this case.

I was using 5W-40 Delvac 1 synthetic--started better than all my friends' rigs with gas propulsion.

WOW...and I thought I had too much time on my hands....Nick I think he wants to meet us at the flag pole

You're both dumbarsses!!!:lol:

and we already knew that):h

WOW...and I thought I had too much time on my hands....Nick I think he wants to meet us at the flag pole

No, I'll see both of you in the parking lot immediately, and I'm gonna beat both of you like a Sunday morning boner.):h

HOLY OFF TOPIC BATMAN! but its still funny...

LMAO...

You guys are funny because I believe you're arguing over nothing! I'll go check in a second to be sure, but I believe -40 is where the two scales cross...-40 F = -40 C in other words!):h
:exactly: You beat me to it.

No one's beating anyone. I'll beat both of you at the same time if thats what you both want...

Kelly, dont let Scott see this thread as he'll have a field day with it.

Oh and this is what I get for being a dumbass.

where do the 05 duramax plug in at?

where do the 05 duramax plug in at?
It should be wrapped up about mid engine on the passenger's side.

where do the 05 duramax plug in at?They plug-in at the wall outlet in the garage!!! ):h

However, the pigtail for the block heater is in the engine compartment, passenger side as emerson stated above.

Hey all;
Here's my cold story!! I was working in Ft. Nelson BC Canada 2 winters ago and I flew back to Calgary for 5 days. It was -45 C (-49F) the afternoon (it was a beautiful sunny day - LOL), when I got to the airport all the plug in spots were gone so I had no choice but to leave my truck unplugged. While I was gone it never got above -55C (-67F). I got back I cycled the glow plugs twice and it started on the first crank. I let it idle for 5 minutes and then hit the road without a hitch. I run synthetic 5w-30 in the winter with syntheic in the diff's and transfer case.

-67 huh, and I think that 40 is cold.

-67 huh, and I think that 40 is cold.

40 is cold. It's just not Pluto-cold.

Put 0W40 synthetic in and new Exide batts w/850 CCA. It started this morning without being plugged in at -32 C.

I try and plug mine in as it gets enough engine abuse from me when driving . I have started it in some - 20 or better weather and it cranked over fine , You do get a little rattle at first (she is pissed you didn't plug her in and you could have ) but why make your truck suffer.
I come from the old 6.2 days and its almost habit for me PLUG HER IN ! Plus you get heat way faster and she runs better !

My 06 LBZ was about -6 C, my 04 gas was -20 C, my old 99 powersmoke was about -20 C. All not plugged in. I also had a 98 dodge that i had to plug in until about +15 C or it wouldn't start, company truck, so i don't care.

-35C. Forgot to plug in. Started first crank after glow plug light. High Idle to warm-up. Won't forget to plug in again. Too risky!

I started mine at 14 degrees and forgot to use the glow plugs. i use 15w40 rotella oil too. fired right up.

With my 05LLY, it was -30 to -35F for about three days at night never plugged in. No problem with 15w40 fired first crank, Had a bet with a powerstroke........ yep he lost):h

-39 for my LB7 dually not plugged in parked out on the ice. Started fine just a but she was little angry at first and haven't had the lly 5500 in anything colder than -5 yet bought in late winter.

I don't remember - but I found the conversion dissussion funny. I'm going to watch you guys beat each other up over at the flag pole.

Minus 8 to Minus 12 three days in row. Wyoming with Rotella 15W40. I apparently was colder then the truck as had trouble starting!

I think it was today at about 27 to 30*F 15-40 Rotella T... Cali

I've never seen below 0*F but maybe low single digits in Mass when I visit the family. Always starts right up without using the coolant heater. I don't know how you guys using rotella 15W40 dino can do it, I had some in the garage that turned to molasses at just 30*F. I always use 5W40 rotella synthetic after temps get below 40*F.

I'm curious...when you guys are starting at less than 10 degrees or so...how long does your wait to start light stay on?

I'm curious...when you guys are starting at less than 10 degrees or so...how long does your wait to start light stay on?


LESS THAN 5 SECONDS ..... :)

coldest Start For Mine Was Probably -10 Below..... (forgot To Plug It In !!) :(

i Park In A Heated Garage , But Sometimes Its Not Always In Thier !!

otherwise , I Always Plug It In At Night !!
also I Plug Into A Timer That Starts The Heater 4 Hours Before Im Going To Start It !! Any Longer Than 4 Hours Of Warming Is A Waste .... Imho

i Dont Like The Cold Starts On The Engine , And I Run Mobil 15w-40 Year Round !!

my .02 On This

Definately not a record but today it was 44deg in Chula Juana. Truck started easier than I did.

coldest Start For Mine Was Probably -10 Below..... (forgot To Plug It In !!) :(

i Park In A Heated Garage , But Sometimes Its Not Always In Thier !!

otherwise , I Always Plug It In At Night !!
also I Plug Into A Timer That Starts The Heater 4 Hours Before Im Going To Start It !! Any Longer Than 4 Hours Of Warming Is A Waste .... Imho

i Dont Like The Cold Starts On The Engine , And I Run Mobil 15w-40 Year Round !!

my .02 On This

That's a good idea. I never thought of a timer for the truck. I just went and bought a few for the Christmas lights, now I have another use for one!

-28 to -32 Deg C, -18 to -26 Deg F. Starts great, still I prefer to plug in. Always in first crank.

-30C this morning. Started great.

30 degrees out.

I can't even complain about the "warm up", I can't even imagine you guys hopping in your truck with no heat.

Absolute zero is the lowest possible temperature (http://en.wikipedia.org/wiki/Temperature) where nothing could be colder and no heat (http://en.wikipedia.org/wiki/Heat) energy remains in a substance. Absolute zero is the point at which molecules stop and they have minimal movment vibrations (http://en.wikipedia.org/wiki/Vibrations) or none, retaining only quantum mechanical (http://en.wikipedia.org/wiki/Quantum_mechanics), zero-point energy (http://en.wikipedia.org/wiki/Zero-point_energy)-induced particle motion.
By international agreement, (http://www1.bipm.org/en/si/si_brochure/chapter2/2-1/2-1-1/kelvin.html) absolute zero is defined as precisely…

0 K on the Kelvin (http://en.wikipedia.org/wiki/Kelvin) scale, which is a thermodynamic (absolute) temperature (http://en.wikipedia.org/wiki/Thermodynamic_temperature) scale, and
–273.15 °C on the Celsius (http://en.wikipedia.org/wiki/Celsius) scale.Absolute zero is also precisely equivalent to…

0 °R on the Rankine (http://en.wikipedia.org/wiki/Rankine) scale (also a thermodynamic temperature scale), and
–459.67 °F on the Fahrenheit (http://en.wikipedia.org/wiki/Fahrenheit) scale.While scientists can not fully achieve a state of “zero” heat energy in a substance, they have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects (http://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_condensate)). In 1994, the NIST (http://en.wikipedia.org/wiki/National_Institute_of_Standards_and_Technology) achieved a record cold temperature of 700 nK (http://en.wikipedia.org/wiki/Kelvin#SI_prefixed_forms_of_kelvin) (billionths of a kelvin). In 2003, researchers at MIT (http://en.wikipedia.org/wiki/Massachusetts_Institute_of_Technology) eclipsed this with a new record of 450 pK (http://en.wikipedia.org/wiki/Kelvin#SI_prefixed_forms_of_kelvin) (0.45 nK).

-37c 0w40

Coldest? 0*F, forgot to plug the truck in the night before, started fine but froze my A$$ of until the truck warmed up. Glad I had seat heaters. The oil was Amsoil 5w-30 HDD.

-2 w/ block heater tripped :(. My glow plug light at that temp takes a soldid ten seconds to go off, but does go off so shoudlnt be an open in the glow plugs.

-5 degrees, delo 400

Haven't tried my '07 yet but with my '03 I started it at -26 F with no problem other than it made sounds I would never want to hear again & at -8 F I started it with no glow plugs & it lit right up.

-28C Not plugged in with 15-40 mineral oil.
-35C Plugged in with 5w40 Valvoline Premium Blue full synthetic (awesome oil). I'm sure it would have still started that time if it wasn't plugged in though.

Where I live now, I have no doubts I'll see it get colder than that.

I might have to look at an Espar Heater just to be a little kinder when I'm in the bush and can't plug her in.

Man, how do you guys handle them cold temps?
Is the old saying true, you get used to it?

-33 c using Petro canada 's 5w-40 Duron synthetic. At these temps dosen't matter what oil it sounds painful when first started.

Man, how do you guys handle them cold temps?
Is the old saying true, you get used to it?

After a while it doesn't feel as cold anymore.:lol: :lol: :D :D

New Year's Day 2002 in Northern WV, -10 F, Shell Rotella-T 5W40 synthetic
Yesterday in SE Idaho, -10 F, Amsoil Diesel and Marine 15W40 synthetic

Both times, took two cranks (normally fires on first crank) engine was running rough and only firing on a few of the eight for 20 seconds or so and smoking blue/gray.

Have started both this one and an '02 at -38 C, in Canada, plugged in to hydro.

They tend to fire on a few cylinders and die....re-start and a few more cylinders light up and it will likely stay running. Sounds bad for a few minutes, like a bag full of loose parts but it will quieten down and run smooth after a few minutes.

After the oil pressure starts to fall off.... 30 minutes or so, still no heat in heater, start driving gentlely until heat comes up. Never gots hot.

If you are going to start it that cold, may as will leave it run all day......

Man, how do you guys handle them cold temps?
Is the old saying true, you get used to it?

:exactly:Our bodies tend to adjust to it. By the time spring rolls around, -15c or warmer feels like T-shirt weather. And when it is like that, I usually end up dressing real light, especially on sunny days. The cold is rejouvenating, for me anyway. Hurry up spring, my fav time of year.

wow! you guys get to shut yours off.the only time mine gets shut down is when it breaks.:D

wow! you guys get to shut yours off.the only time mine gets shut down is when it breaks.:D
Hey now, it got shut off when you came to my dads house.):h

-25C when I for got to plug it in. I use Duron 5W40 synthetic as well. Truck started fine, but I thought my buddy had his Powerstroke in the yard for the first couple of minutes until it warmed up a bit. I hate to do that to my baby (make it sound like a Powerstroke, that is) :).

15 degrees using amsoil 15w-40. no problems.

-39F 3 glow cycles, 1/4 throttle and a quick prayer to the almighty.

Scary sound when she only hits on 2 cylinders, and the low oilpressure warning comes on in the DIC.

after 20 seconds, the oil press warning went out.

5W-40 Synthetic oil.

-25 to -30deg c started right up

-52 with regular 5w40. Starts right up with no problem

-52:eek: with regular 5w40. Starts right up with no problem

No thanks. I'm dreading going to Omaha, Nebraska and being in the teens. Cold in Texas is low 30's in Houston.

Whats the longest your "wait to start" light has been on?

-52 with regular 5w40. Starts right up with no problem
You're saying without being plugged in, sitting outside all night with no heat to it, 5W40, -52 without windchill, it starts? My -37C post wasn't a joke; it was last Saturday morning here in Yellowknife. My batteries are new 850CCA and there wasn't a lot leftover in them when my truck did start.

Man, you guys in The Great White North make our temps look tropical here in the lower 48. My lowest unplugged start was -20F up near Steamboat using Delo 400 15W40...and it barely started.

You're saying without being plugged in, sitting outside all night with no heat to it, 5W40, -52 without windchill, it starts? My -37C post wasn't a joke; it was last Saturday morning here in Yellowknife. My batteries are new 850CCA and there wasn't a lot leftover in them when my truck did start.

That was with it plugged in. I have started at -35 without it it being plugged in and still had no problems. I'm just waiting for it to hit -60 and below to she how it does.

No thanks. I'm dreading going to Omaha, Nebraska and being in the teens. Cold in Texas is low 30's in Houston.


I know how you feel. I left my base in San Antonio last Feb and it was like 75 when i left and -45 when I got here in Alaska.

That was with it plugged in. I have started at -35 without it it being plugged in and still had no problems. I'm just waiting for it to hit -60 and below to she how it does.
For minute there I thought my truck was a malingerer, complaining at -37C without being plugged in.:) I don't have a place to plug in here and also power is quite expensive.

I run a '05 LLY dually all over the 11 western states. The other night in Tremonton, Utah it was 0* I came out of my room and it fired right up. I use Delo 400 and about 8 oz. of Prolong oil additive.