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#4468383 - 07/23/17 08:38 PM 07 Chevy 2500 H.D. with 8100 and Allison trans.
Farmncraig Offline


Registered: 07/23/17
Posts: 4
Loc: Va, Craig
Would it be alright to use 15w50 synthetic oil in this motor. It only has 50000 miles on the engine.

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#4468387 - 07/23/17 08:41 PM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
901Memphis Offline


Registered: 08/14/10
Posts: 12893
Loc: Northern Kentucky
As long as it's not really cold out.
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2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980

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#4468389 - 07/23/17 08:42 PM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1657
Loc: Crawfordville FL
It won't hurt it but why?
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2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4468392 - 07/23/17 08:44 PM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
You could, but why? What's wrong with the OE spec? They're great engines that live a long life on the original specified or multi-fleet 15w40. They pull really hard but I've never met one that didn't consume a fair bit of oil.
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P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

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#4468409 - 07/23/17 09:05 PM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
CT8 Offline


Registered: 10/09/14
Posts: 10979
Loc: Idaho
Originally Posted By: Farmncraig
Would it be alright to use 15w50 synthetic oil in this motor. It only has 50000 miles on the engine.
Is the oil properly rated?
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"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4468542 - 07/24/17 12:20 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
Dyusik Offline


Registered: 09/26/14
Posts: 1982
Loc: US-WA
As long as it is CI/J/K, I can't see why not. I've seen one Chevy of the same year and engine for sale, for and astronomical price, considering it had 735k and no rebuild to anything. I was surprised.
_________________________
95 Cherokee 190K DELO 10W30,XG8
07 IS250 97K FB ?w??,FULL
04 YZF-R1 19K DELO 15w40,XG7317
99 HD XL1200S 18K 76 20w50,1515
14 RX450h 30k PP 0w20,NAPAG

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#4468613 - 07/24/17 06:10 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5236
Loc: Fort Lauderdale, FL
20w-50 synthetic is a very common fill for that engine in marine duty. The engine won't care.

I would back off to a 5w-40 in the winter if you get super cold winters.
_________________________
07 Lincoln Navigator M1 0w-40/FU
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#4469291 - 07/24/17 07:52 PM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
nascarnation Offline


Registered: 04/30/04
Posts: 817
Loc: Indiana
When we ran this combo in the Allison lab, we used Mobil 1 15W50 in the engines.
None of the many engines we failed were lube related problems, it was always broken pistons, rods, and valve springs. All of which were related to the high rpms the test cycle ran.

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#4476260 - 08/01/17 07:56 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
Farmncraig Offline


Registered: 07/23/17
Posts: 4
Loc: Va, Craig
thanks and what do you consider cold winter I am in va, but have older dodge 5.9 gas and used it since I bought it used and no problem just like to use the same across the board. was worried small oil passages and would damage the 8.1 engine.

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#4476281 - 08/01/17 08:40 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
Ammofirst Offline


Registered: 06/22/17
Posts: 353
Loc: Western usa
How cold does it get in the winter ?

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#4476324 - 08/01/17 09:17 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Ammofirst]
Farmncraig Offline


Registered: 07/23/17
Posts: 4
Loc: Va, Craig
never real cold at one time can fluctuate from 50 to single digits

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#4476325 - 08/01/17 09:17 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
Farmncraig Offline


Registered: 07/23/17
Posts: 4
Loc: Va, Craig
what is the opinion of mobil 1 10w30 in this engine

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#4476328 - 08/01/17 09:20 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
4WD Offline


Registered: 09/21/10
Posts: 6374
Loc: Texas
HDEO like Delo or Delvac is best for the buck ...

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#4476363 - 08/01/17 09:59 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
Ammofirst Offline


Registered: 06/22/17
Posts: 353
Loc: Western usa
What does the owners manual say ? Mobil 1 10w-30 high mileage may work. It's hths number is thicker than standard mobil 1 10w-30

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#4476364 - 08/01/17 09:59 AM Re: 07 Chevy 2500 H.D. with 8100 and Allison trans. [Re: Farmncraig]
bigt61 Offline


Registered: 02/12/13
Posts: 3117
Loc: Virginia
I used 15W-50 M1 in my big block 92 Suburban when I used to tow a race car around. (about 12,000 lbs w trailer,tools & spares) No problems, but it didn't get driven much in the winter & was always garage kept. If you're working the truck hard like I was, go for it. If not, your 10W-30 is fine.
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92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
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