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#4625834 - 01/06/18 11:40 AM Oil for Cold starting diesels
Snagglefoot Offline


Registered: 12/31/17
Posts: 2083
Loc: SE British Columbia, Canada
Looking for opinions on dealing with cold starting diesels in Canada and the northern States ( and some of the recently affected southern states) My neighbour has a 2004 Ford F-350 with a 6 liter diesel. Itís a bit stumbly when he starts it in cold weather. Cold up here means 0 F to 32 F. He has his favourite quick change place that is currently selling him Rotella T 10W-30 conventional (photo attached). He has no room to garage the truck. During the winter he plugs in the block heater which is on a timer and keeps it plugged in for 10 hours per day. The cost of the power is about $ 1.50 per day.

I suggested he change to Rotella T-6 5-40 and bought a liter of 5-40 and the Rotella T. Actually I couldnít find a 1 liter of Rotella T-6 so I substituted a bottle of Mobil 5-40 diesel truck oil. Itís easy to see the 5-40 pours better but the difference was not as dramatic as those -40 pour tests you see on You Tube.

My neighbour is a bit old school and wasnít keen on paying the price on the synthetic. However I explained he might be able to unplug on warmer days and get the same type of start. One question is regarding Rotella T-5 10-30, the semi-synthetic. (Photo attached). Itís priced cheaper that T-6 but was wondering how much difference he might expect when trying to cold start with the T-5. Does anyone use T-5?

Finally, I hear rumours the Rotella T is going to be rebranded as T-4. Anyone hear anything about that?

Can we please keep the discussion to Rotella products. I donít think I would be able to get him to change brand. Thanks. Fire away!

SF












Edited by Snagglefoot (01/06/18 11:51 AM)

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#4625856 - 01/06/18 12:00 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
andyd Offline


Registered: 09/25/04
Posts: 7435
Loc: Marshfield , MA
add a qt of MMO to crankcase for winter time. Dunno truck's oil capacity. MMO says it is safe for up to 20% of capacity.
_________________________
'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2

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#4625862 - 01/06/18 12:05 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
skyactiv Offline


Registered: 03/02/13
Posts: 4632
Loc: The Midwest
First of all, I wouldn't wanna help anyone engine wise that owns an old Ford with that engine. You know how people are, you can be blamed if anything goes wrong and that particular diesel truck isn't the pinnacle of reliability.

Advance Auto has Shell Rotella T6 0W40 in stock at stores where I live. Is it available up there?
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#4625878 - 01/06/18 12:15 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
Donald Offline


Registered: 03/21/04
Posts: 20674
Loc: Upstate NY
I almost exclusively use Rotella T6 5W40 in my older Cummins diesel engine when I had that pickup and now my Ford Powerstroke. Synthetic oil always flows better in cold weather.

Get the newer containers of T6 that say they meet the Ford diesel oil spec.

You can go longer using synthetic oil for an OCI.

I hope he bullet-proofed the engine before it encounters big problems.
_________________________
2015 Subaru Forester 2.5 engine/CVT
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#4625909 - 01/06/18 12:32 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2618
Loc: Cedarbrae, Ontario
Canadian Tire has Rotella 0w40 diesel oil. That's what I would go for.
_________________________
2015 RAM SXT Crew Cab 5.7 with 6 speed tranny.

2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)


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#4625935 - 01/06/18 12:48 PM Re: Oil for Cold starting diesels [Re: skyactiv]
Snagglefoot Offline


Registered: 12/31/17
Posts: 2083
Loc: SE British Columbia, Canada
Originally Posted By: skyactiv
First of all, I wouldn't wanna help anyone engine wise that owns an old Ford with that engine. You know how people are, you can be blamed if anything goes wrong and that particular diesel truck isn't the pinnacle of reliability.

Advance Auto has Shell Rotella T6 0W40 in stock at stores where I live. Is it available up there?



Yes, we have it at Canadian Tire. Thanks.

SF

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#4625956 - 01/06/18 01:04 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
walterjay Offline


Registered: 04/12/09
Posts: 270
Loc: Maryland
I use Rotella 5w-40 in my diesels. They start down to 0 without any heaters.

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#4625965 - 01/06/18 01:11 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
CT8 Offline


Registered: 10/09/14
Posts: 11495
Loc: Idaho
It is a bit stumbly because it is cold. It starts?
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#4625973 - 01/06/18 01:16 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
KrisZ Offline


Registered: 12/23/06
Posts: 7561
Loc: Toronto, Canada
The oil will not help one bit at these temps. Diesels by nature are stumbly when cold. If the truck starts on the first try, there is no problem. If it doesn't the I would check the glow plugs.
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2015 Dodge Grand Caravan-21k miles.
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#4625981 - 01/06/18 01:21 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
Snagglefoot Offline


Registered: 12/31/17
Posts: 2083
Loc: SE British Columbia, Canada
Yes, it starts and runs on the first try but needs quite a while to smooth it to the point you would want to drive it.

SF

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#4626016 - 01/06/18 01:53 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
roadrunner1 Offline


Registered: 04/08/09
Posts: 1287
Loc: oh
The cold-flow properties between 5w-40 & 10w-30 are nearly identical, so switching between the two wont make a difference.
Having previously owned two 6.0's (and starting at -40F) your neighbors problem could be several things.
One being the FICM, which can be damaged by low voltage, another being the HPOP fitting. It begins to leak slightly but more noticeable on warm starts. The injectors are fired by the High Pressure Oil Pump and a leaky fitting won't supply ample oil pressure to fire the injectors, again much more noticeable on warm starts.

Start with the FICM, ensure batteries are in excellent shape, switching oil isn't going to make a difference.
_________________________
'15 F350 6.7

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#4626024 - 01/06/18 02:03 PM Re: Oil for Cold starting diesels [Re: roadrunner1]
Snagglefoot Offline


Registered: 12/31/17
Posts: 2083
Loc: SE British Columbia, Canada
Originally Posted By: roadrunner1
The cold-flow properties between 5w-40 & 10w-30 are nearly identical, so switching between the two wont make a difference.
Having previously owned two 6.0's (and starting at -40F) your neighbors problem could be several things.
One being the FICM, which can be damaged by low voltage, another being the HPOP fitting. It begins to leak slightly but more noticeable on warm starts. The injectors are fired by the High Pressure Oil Pump and a leaky fitting won't supply ample oil pressure to fire the injectors, again much more noticeable on warm starts.

Start with the FICM, ensure batteries are in excellent shape, switching oil isn't going to make a difference.


Thanks. Advice taken. However, on the cold pour properties itís 10-30 conventional vs 5-40 synthetic. I have a video at 5 degrees F comparing the two. Itís not a stunning difference but is significant. My vid is too large to load here.

SF

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#4626038 - 01/06/18 02:22 PM Re: Oil for Cold starting diesels [Re: skyactiv]
JC1 Offline


Registered: 11/29/08
Posts: 3114
Loc: Oshawa, Ontario Canada
Originally Posted By: skyactiv
First of all, I wouldn't wanna help anyone engine wise that owns an old Ford with that engine. You know how people are, you can be blamed if anything goes wrong and that particular diesel truck isn't the pinnacle of reliability.

Advance Auto has Shell Rotella T6 0W40 in stock at stores where I live. Is it available up there?



+1, your buddy wants to be cheap and not buy synthetic oil and he won't change brands. Sounds like you care more about his truck than he does. I would leave him alone, he's obviously not losing any sleep over his choices.
_________________________
2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter

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#4626069 - 01/06/18 02:54 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
PiperOne Offline


Registered: 10/25/17
Posts: 197
Loc: A Highway Near You
If the stumbly start clears itself up within 10 to 20 seconds it isn't the oil..it's a glow plug/plugs or just because it's cold. Now if it is cranking slow and that's causing it to struggle to fire at all...oil wil help.

Kudos for caring about his truck tho!
_________________________
HDEO in Diesel Engines. No spark plugs here.

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#4626081 - 01/06/18 03:13 PM Re: Oil for Cold starting diesels [Re: Snagglefoot]
roadrunner1 Offline


Registered: 04/08/09
Posts: 1287
Loc: oh
Originally Posted By: Snagglefoot
Originally Posted By: roadrunner1
The cold-flow properties between 5w-40 & 10w-30 are nearly identical, so switching between the two wont make a difference.
Having previously owned two 6.0's (and starting at -40F) your neighbors problem could be several things.
One being the FICM, which can be damaged by low voltage, another being the HPOP fitting. It begins to leak slightly but more noticeable on warm starts. The injectors are fired by the High Pressure Oil Pump and a leaky fitting won't supply ample oil pressure to fire the injectors, again much more noticeable on warm starts.

Start with the FICM, ensure batteries are in excellent shape, switching oil isn't going to make a difference.


Thanks. Advice taken. However, on the cold pour properties itís 10-30 conventional vs 5-40 synthetic. I have a video at 5 degrees F comparing the two. Itís not a stunning difference but is significant. My vid is too large to load here.

SF


It doesn't matter if you're comparing synthetic to dino, the oil has to meet the sane spec.
The "W" doesn't directly correlate between different viscosities, in other words a 5w-30 and a 5w-40 have different cold cranking specs to meet, which is why a 5w-40 and a 10w-30 are nearly identical, synthetic or not.

There are now 5w-30 HDEO lubes available, along with 0w-40, and 0w-30. Your location isn't cold enough to require these, but they are available. If finances allow have the FICM tested, there are tests that can be performed at home to test these with a google search. When solder joints become stressed within the FICM (due to low battery voltage) is when cold-start issues are the most noticeable.
I am pulling from memory but they step up voltage to 48 volts for the injectors, so a weak joint on the 12 volt side only magnifies itself to 48 volts.

Keep us updated on the truck.
_________________________
'15 F350 6.7

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