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#4697570 - 03/17/18 12:36 PM M1 10W30 2015 Silverado 5.3L
Realtech214 Offline


Registered: 02/01/13
Posts: 713
Loc: Florida
Wel i finally tried some 30wt in my 2015 L83. Spec is for 0W20. The Mobil 1 5W20 ive been using is 8.9cst @100*C and the 10w30 is 10.1 so they are very close to eachother. There is no difference in how she runs. Very very slightly increased oil pressure. I would guess by the gauge on the dash maybe ~3-4 psi ? Almost identical though. Runs nice and quiet.

I believe the mobil 1 10W30 is a good choice for those wanting to run a 30wt in a 20wt specced vehicle as the viscosity is very close to a 20.

Who else is running a xW30 in these engines? 4.3 5.3 6.2
Thanks. Give it a try!
_________________________
2015 Silverado Crew Cab 5.3 LT 106,xxx miles
2001 Suburban LT 155,xxx miles
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#4697585 - 03/17/18 12:51 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
gfh77665 Offline


Registered: 09/01/08
Posts: 3825
Loc: Southeast Texas
Your 10w-30 in FL is likely the same as running 0w-20 in the northern US tier and Canada, for much of the year. 10w-30 works great on the Gulf Coast.

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#4697606 - 03/17/18 01:15 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
clinebarger Offline


Registered: 12/19/13
Posts: 1994
Loc: Fort Worth, Texas
GM still specs 5w30 in the LT1 engines found in Camaro & Corvette.
_________________________
2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto

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#4697723 - 03/17/18 04:19 PM Re: M1 10W30 2015 Silverado 5.3L [Re: clinebarger]
code5coupe Offline


Registered: 05/17/04
Posts: 39
Loc: Poway, CA
Originally Posted By: clinebarger
GM still specs 5w30 in the LT1 engines found in Camaro & Corvette.

I.e. GM hasn't changed the oil spec for the old LT1 engines.

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#4697760 - 03/17/18 04:56 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
SR5 Offline


Registered: 07/07/15
Posts: 4529
Loc: Down Under
Quote:
The Mobil 1 5W20 ive been using is 8.9cst @100*C and the 10w30 is 10.1 so they are very close to eachother

I agree, they are very close in operational viscosity.
I've used a Euro A3 rated 30 grade oil that had an operational viscosity of 12.2 cSt at 100C (Castrol Magnatec 5W30 A3/B4). So your M1 10W30 is closer to the previous M1 5W20 than my Magnatec 5W30 A3/B3.

Your logic is good, grades are coarse, there is better detail looking at the actual measured viscosity values.

Quote:
Your 10w-30 in FL is likely the same as running 0w-20 in the northern US tier and Canada

Yep somebody short tripping in a Canadian winter on a 20 grade, is most likely using a thicker oil than I am driving through the outback in summer on a 30 grade or even a 40 grade.

We know cars can handle different oil grades, simply because they can handle different climates and driving styles.
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#4697789 - 03/17/18 05:31 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
Sierra048 Offline


Registered: 02/26/11
Posts: 846
Loc: N. Georgia Mtns
Is this vehicle spec'd for a Dexos oil? Not that I care since I'm thinking on using a 10W30 myself here in Georgia.
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#4698009 - 03/17/18 08:46 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
passgas55 Offline


Registered: 09/26/04
Posts: 95
Loc: South La
2007 chevy w/t 4.3 v6 rolling on 210000 by the end of next week. My first oil change 10 years ago was 10/30 and that grade is all this truck knew. If I bought a new chevy that spec 0/20 as soon as it comes out of warranty it would be either a 5/20 or a 10/30. I live in south Louisiana so I do not see a use for a zero as the first number in my oil.

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#4698087 - 03/17/18 09:51 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Sierra048]
Realtech214 Offline


Registered: 02/01/13
Posts: 713
Loc: Florida
It is. I saw that the M1 10w30 viscosity was almost the same as the xW20 that is spec. I like it so far!

For some reason a 30wt in this truck make me feel a little more warm and fuzzie.
_________________________
2015 Silverado Crew Cab 5.3 LT 106,xxx miles
2001 Suburban LT 155,xxx miles
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#4698142 - 03/17/18 10:40 PM Re: M1 10W30 2015 Silverado 5.3L [Re: Realtech214]
das_peikko Offline


Registered: 01/01/18
Posts: 534
Loc: San Antonio, TX
Originally Posted By: Realtech214
Runs nice and quiet.


That's all that matters right there.

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