WJ + XJ Rotella T5 10w-30 vs. Mobil 1 high mileage vs. Castrol high mileage. - Page 6 - JeepForum.com

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post #76 of 117 Old 11-15-2012, 12:18 PM
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post #77 of 117 Old 11-15-2012, 12:21 PM
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Quote:
Originally Posted by as350b3e View Post
I live in Canada where the temps are right now at - 16 celsius......brrrr but soon tye temps will get even lower to -30 and sometimes to -40. Is the castrol hm 5w30 the correct choice or should i be using a 10w30 or even something else?

Cheers

I'm running it right now, love the stuff my Jeep runs fantastic on it and it cleans very, very well also. But IMO no it's definitely not what you want for a Canadian winter, Castrol HM is the thickest HM oil you can buy and the 5w30 version is thicker than many ordinary 10w30's. The "5w30" on the bottle is just a start, there is still tremendous variation between oils all in that grade, it's just a "range" not a specific number that has to be hit.

For your winters I'd suggest Valvoline Maxlife 5w30, it's thinner, and flows much better than the Castrol at cold start up, it's absolutely great stuff I consider the pair of them the best two "High Mileage" oils made by far. Maxlife is the most popular HM oil for a reason.

For reference as I said I'm running the Castrol HM 5w30 right now and I don't even plan to run it through our Missouri winter which is a farce compared to yours in Canada. I'll be changing in a few hundred miles and will be blending the Castrol HM 5w30 with 5w20 to thin it down for the winter months. If I was running Maxlife I wouldn't have to do that but I'm sticking with the Castrol for a good while yet, I like it that much.
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post #78 of 117 Old 11-15-2012, 12:35 PM
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What an interesting discussion. I have a 4.0 with 115,xxx and I run Mobil1 full synthetic in it because for past 12 years that's the only oil I've used in my cars. After reading this I'm switching to Mobil1 High Mileage.
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post #79 of 117 Old 11-15-2012, 01:59 PM
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Originally Posted by JeepIsKing View Post
What an interesting discussion. I have a 4.0 with 115,xxx and I run Mobil1 full synthetic in it because for past 12 years that's the only oil I've used in my cars. After reading this I'm switching to Mobil1 High Mileage.
Good choice for the 4.0. Like the Castrol the Mobil HM is thick, you won't need anything more than the 5w30.
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post #80 of 117 Old 11-15-2012, 02:10 PM
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Quote:
Originally Posted by KayCeeJeep

Good choice for the 4.0. Like the Castrol the Mobil HM is thick, you won't need anything more than the 5w30.
Idk I have 193k on my 4.0 ran Valvoline h'm forever just switched to rotella t5 and wow instant difference engine is whispered quite and runs better that's in the first 100 miles from making the change. Plus its cheaper!

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post #81 of 117 Old 11-15-2012, 05:18 PM
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I was under the impression that Shell ROTELLA was designed for heavy duty commercial vehicles such as 18 wheelers and so on??? How come our WJ engines like it???
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post #82 of 117 Old 11-15-2012, 05:21 PM
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Quote:
Originally Posted by JeepIsKing
I was under the impression that Shell ROTELLA was designed for heavy duty commercial vehicles such as 18 wheelers and so on??? How come our WJ engines like it???
Do the research on here and all over the web the 4.0 loves the oil and you can use it in gasoline engines has the same certs.

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post #83 of 117 Old 11-15-2012, 05:30 PM
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Up until very recently the label on the Rotella bottle said "heavy duty engine oil" they changed it to "diesel engine oil". The formula is the same as before and the name was changed to keep the alloted amount of zinc additive in the oil because its "for diesel engines". Gotta love loopholes!

Why does the 4.0 like it? Well most older diesel engines still run solid lifters (cat 3204, 3208, 3304, 3306) so these engines need lots of zinc. Our engines run flat tappet hydraulic lifters so there's the common ground, the only difference is we don't have very high valve spring pressure.

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post #84 of 117 Old 11-15-2012, 05:57 PM
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Rotella is great stuff and still one of my favorites, it's API SM rated so it can safely be used in gassers like Jeeps too.

Heck once all 4 of our vehicles had Rotella in them at the same time. Kind of like a high mileage oil on steroids.
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post #85 of 117 Old 11-15-2012, 06:06 PM
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Quote:
Originally Posted by Cirruslydakota
Up until very recently the label on the Rotella bottle said "heavy duty engine oil" they changed it to "diesel engine oil". The formula is the same as before and the name was changed to keep the alloted amount of zinc additive in the oil because its "for diesel engines". Gotta love loopholes!

Why does the 4.0 like it? Well most older diesel engines still run solid lifters (cat 3204, 3208, 3304, 3306) so these engines need lots of zinc. Our engines run flat tappet hydraulic lifters so there's the common ground, the only difference is we don't have very high valve spring pressure.

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Thank you very much for the explanation. I won't be switching to ROTELLA just because I've used Mobil1 Full Synthetic for past 12 years and never had problems with it.
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post #86 of 117 Old 11-15-2012, 07:57 PM
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I ren Mobil one in everything until I bought my mustang. The cam phasers used oil pressure and were very picky on what oil you used and would throw an error code. So I put motorcraft full synthetic in it and never had an issue. I switched to Rotella on my jeep for the added protection after viewing many UOA. Then after buying my speed3 Mazda changed the spec from 5w-30 to 5w-40 because of turbo drain issues and the direct injection being hard on the oil. Again, UOA showed that Rotella didn't shear its weight down compared to anything else. Heavy duty engine oil indeed. Is use Mobil 1 again in a heartbeat if I had anything that could use it.

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post #87 of 117 Old 11-16-2012, 09:35 PM Thread Starter
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i got the castrol high mileage 10w-30 blend is part conventional part synthetic with 2 wixes for the grand and xj 4.0s and for the 2011 liberty 3.7L i went with the conventional 5w-20 castrol and not the valvoline " premium conventional"
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post #88 of 117 Old 01-10-2013, 10:53 AM
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I know this is an old thread but here is what happened when I ran rottella. My oil pressure will not drop below 80 unless at idle. Changed oil and filter still have same prob. I think oil pressure sensor is next.

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post #89 of 117 Old 01-10-2013, 03:08 PM
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Quote:
Originally Posted by aeking View Post
I know this is an old thread but here is what happened when I ran rottella. My oil pressure will not drop below 80 unless at idle. Changed oil and filter still have same prob. I think oil pressure sensor is next.

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below 80' what''' Iam useing rottella T6 for winter, You got an problem with
your oil pressure senser.

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post #90 of 117 Old 01-10-2013, 04:41 PM
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Basically for 4.7 any xw-30 SM rated will work, the T5 10w-30 meets that.

Quote:
Originally Posted by JeepIsKing View Post
I was under the impression that Shell ROTELLA was designed for heavy duty commercial vehicles such as 18 wheelers and so on??? How come our WJ engines like it???
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