0W30 0r 0W40 Euro Edge for a Mountain tow

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Hello, it's been a while since I've been active on this form. I'll get right to it then. I'm planing a 1,000 mile one way or so vacation to the Colorado Rockies and Custer/Badlands South Dakota area this summer. I've been religiously using GC 0W30 for 6 years now. While towing a 3,000lb single axle travel trailer through Yellowstone in 2013 I experienced a higher than expected coolant temp of 220* or so traversing the north entrance of Yellowstone. I'm expecting the same climbs in Colorado this year in late June with a heaver 5,000lb travel trailer pulled by my 2000 Silverado EC Z71 with the 5.3L and HD tow setup. I'm thinking of using the 0W40 Euro Edge in my sump for this springs annual oil change. I will also be installing a larger 34" radiator with the integrated engine oil cooler prior to the pull. So question is which weight oil would be best for my one year oil change interval? Transmission has a larger stacked plate cooler running Royal Purple Max ATF. All other oils are Mobil 1 of RP synthetic.
 
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If you're that worried about the load on your truck use the 0w-40 and don't worry.

I'd also take a close look at the tranny and diff, too.
 
If you're going to install the oil cooler along with the radiator, I don't think your oil temps will get that high. I wouldn't worry about oil temps, so I would stick with the 0W30. That said, the 0W40 won't do any harm.

I think the real issue is going to be trans temp. That year Silverado came with a tranny temp gauge, didn't it? That should help you keep an eye on things. Given your large stacked plate cooler, and good fluid, you should be all set...
 
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You'll be keeping the revs up so your oil pressure would be fine with either.
 
As far as I remember GC 0w30 has quite a robust HTHS so a 0w40 might not really help since the min for a 0w40 is 2.9 and GC is 3.5.
 
Brother, you need to spend less time typing and more time learnin'.

Originally Posted By: Koz1
since the min for a 0w40 is 2.9 and GC is 3.5.
 
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Originally Posted By: Oil Changer
Brother, you need to spend less time typing and more time learnin'.

Originally Posted By: Koz1
since the min for a 0w40 is 2.9 and GC is 3.5.


+1

0W40 will have at least 3.5 to meet Euro spec.

Castrol doesn't list it properly in their spec sheets.
 
Originally Posted By: Koz1
Originally Posted By: Oil Changer
Brother, you need to spend less time typing and more time learnin'.

Originally Posted By: Koz1
since the min for a 0w40 is 2.9 and GC is 3.5.


If you have info that I dont please share.

The info is pretty rudimentary: Both of these oils meet ACEA A3/B4 spec, which means they have to have HT/HS of at least 3.5 cP.
 
Originally Posted By: Koz1
As far as I remember GC 0w30 has quite a robust HTHS so a 0w40 might not really help since the min for a 0w40 is 2.9 and GC is 3.5.


Any Euro 0w-40 is going to be a lot higher than 2.9, as it will meet all the same Euro specs as GC does, which call for an HTHS >=3.5cP. Which is why that's GC's HTHS.
 
Doing a quick search euro spec 0w40 edge has a HTHS of 3.6 vs 3.5 GC, the spec min is 2.9 after searching the conclusion is really your not getting much improvement which is .1.
So whats the Hub Up Bub?
 
Originally Posted By: Koz1
Doing a quick search euro spec 0w40 edge has a HTHS of 3.6 vs 3.5 GC, the spec min is 2.9 after searching the conclusion is really your not getting much improvement which is .1.
So whats the Hub Up Bub?


That would be because they are basically the same oil.

M1 0w-40 has an HTHS of 3.8cP, a bit higher.
 
Really? You're going to argue that you're right and back it up with that ridiculous link [I didn't read]? Haha... Hahahahahahahahaha!!!
crackmeup2.gif


HERE'S A REAL LINK Page 8. You're welcome.

Originally Posted By: Koz1
Originally Posted By: Oil Changer
Brother, you need to spend less time typing and more time learnin'.

Originally Posted By: Koz1
since the min for a 0w40 is 2.9 and GC is 3.5.


If you have info that I dont please share.
http://www.kewengineering.co.uk/Auto_oils/oil_viscosity_explained.htm
Reading that page might help you tremendously.
Cheers.
 
BP's PDS are all but useless.

Originally Posted By: Koz1
Doing a quick search euro spec 0w40 edge has a HTHS of 3.6 vs 3.5 GC, the spec min is 2.9 after searching the conclusion is really your not getting much improvement which is .1.
So whats the Hub Up Bub?
 
You guys are both "right".

The old SAE table allowed for a 0w-40 to have an HTHS of 2.9, the new one, as in the Afton link, does not.

Instead of a link, here's the picture:
SAE_J300_Viscosity_Grades.gif


Which supports what Koz1 thought was the case.

Here is the version that was current as of 2007:
saej.png


The point however, is moot. Any 0w-40 blended for a Euro app will have an HTHS >=3.5cP as that's the minimum for most of the Euro specs.
 
Originally Posted By: Oil Changer
Really? You're going to argue that you're right and back it up with that ridiculous link [I didn't read]? Haha... Hahahahahahahahaha!!!
crackmeup2.gif


HERE'S A REAL LINK Page 8. You're welcome.

Originally Posted By: Koz1
Originally Posted By: Oil Changer
Brother, you need to spend less time typing and more time learnin'.

Originally Posted By: Koz1
since the min for a 0w40 is 2.9 and GC is 3.5.


If you have info that I dont please share.
http://www.kewengineering.co.uk/Auto_oils/oil_viscosity_explained.htm
Reading that page might help you tremendously.
Cheers.


Im starting to think you are emotionally unstable but anyway.
The J300 spec changed sometime at or around 2009 alot of Jaso references are still at the 1999 spec.
The 3.6 came off a BITOG post and if its correct then there is almost no improvement moving to an Edge 0w40.
 
I'll say it again, a little more time reading and a lot less typing would help you out.

Originally Posted By: Koz1
Yes sorry boys and girls.
 
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