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Re: SAE 30 vs 15w40 [Re: racin4ds] #4892355 10/09/18 09:49 PM
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Garak Offline
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Originally Posted by racin4ds
Except T6 5W40 is NOT a SAE30WT and is not the oil it used to be either... they have stripped a lot of the good stuff from it over the years to meet the dumb EPA/insert BS org.

Which can equally apply to API monogrades you see on the market....


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: SAE 30 vs 15w40 [Re: Warstud] #4893652 10/11/18 07:50 AM
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53' Stude Offline
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Originally Posted by Warstud
Originally Posted by dlundblad
I realize SAE 30 is slightly harder to find


Walmart has Rotella T1...Rural King has 3 different brands of SAE30


Yep, Harvest King, Rotella and Mobil



Re: SAE 30 vs 15w40 [Re: dlundblad] #4894077 10/11/18 03:55 PM
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JTK Online Content
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SAE 30 doesn't shear?

Pretty sure a UOA would differ.


2017 Ram 1500 4x4, 3.6L.
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Re: SAE 30 vs 15w40 [Re: JTK] #4894090 10/11/18 04:24 PM
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kschachn Offline
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Originally Posted by JTK
SAE 30 doesn't shear?

Pretty sure a UOA would differ.

I'm not sure how it could with such relatively short hydrocarbon chains. The VII molecules are huge in comparison and far more prone to cleaving from mechanical force.
Nearly every UOA on here cannot distinguish between fuel dilution and actual shear so that is what I think we see most of the time.


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 281K
Re: SAE 30 vs 15w40 [Re: dlundblad] #4894553 10/12/18 09:47 AM
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Gilitar Offline
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Mobil 1 15w50 in all my air cooled OPE.


2017 Honda CRV 2.4L
2018 Toyota Tacoma 3.5L
Re: SAE 30 vs 15w40 [Re: dlundblad] #4894561 10/12/18 09:55 AM
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jeepman3071 Offline
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Been using 15w40 for years now on both my own and customer machines with excellent results. Rotella, SuperTech, and Napa 15w40 have all worked well. The only exceptions are snowblowers which I use 0w30 or 5w30 in and generators which I use 5w40 in for easier starting in winter.


2013 Jeep Grand Cherokee TrailHawk 5.7L (144k) - PPHM 5w30, Wix 57899
2009 BMW 328i (46k) - Castrol Edge Euro 0w40, MANN HU816X
Re: SAE 30 vs 15w40 [Re: dlundblad] #4895293 10/13/18 06:19 AM
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We went to Rural King yesterday for the first time in 3 years as it's somewhat out of the way for us. I had forgotten how fun of a store it was. Baby chickens all the way to firearms.

I had to check out the oil section and saw they had various SAE 30's. When the time comes, I'll scoop some up. I'll most likely just use Rotella.


03 Jeep WJ 4.0 202k Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 158k M1 EP 10w30 Supertech ST3980 (Ecore)

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